{"title":"Blocks","description":"","products":[{"product_id":"ronstan-series-50-triple-all-purpose-block-50mm","title":"Ronstan Series 50 Triple All Purpose Block 50mm","description":"The Ronstan Series 50 All Purpose Block features a triple configuration, ideal for demanding marine applications including sheets, halyards, and control lines. Engineered for both racing and cruising, the block utilizes self-lubricating Acetal polymer sheaves on polished stainless steel races to ensure low friction and reliable performance under dynamic and static loads. The design includes a slotted pin shackle specifically engineered to prevent fouled lines, alongside a snap-fit removable becket pin for versatile installation. Constructed with a grade 316 stainless steel load strap and impact-resistant, fibre-reinforced nylon cheeks, this block delivers exceptional longevity and high working loads. Its swivel shackle head provides full 360-degree rotation for optimal alignment during use.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Triple\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 50mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 2400kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 1200kg\u003cbr\u003e\u003cstrong\u003eMaximum Rope Diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.369kg\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 6mm\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Grade 316 stainless steel, fibre-reinforced Nylon\u003cbr\u003e\u003cbr\u003eItem Code. RF51300\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278042837224,"sku":"20117283","price":99.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/20117283_1.jpg?v=1776722454"},{"product_id":"ronstan-series-50-fiddle-block-50mm-sheave","title":"Ronstan Series 50 Fiddle Block 50mm Sheave","description":"Series 50 All Purpose fiddle blocks provide a versatile, high-performance solution for various sailing control systems. These blocks feature self-lubricating Acetal polymer sheaves that operate efficiently under both dynamic and static loads. The durable 316 stainless steel load strap and fibre-reinforced Nylon cheeks ensure longevity in demanding conditions. Equipped with a Captive Lock universal head, the block can be fixed in one of two planes or left to swivel freely. This design is ideal for mainsheet tackles, halyards, and control line purchase systems on boats up to 10 metres.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 50mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1500kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 750kg\u003cbr\u003e\u003cstrong\u003eMaximum Rope Diameter:\u003c\/strong\u003e 10mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.167kg\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 316 Stainless Steel, Fibre Reinforced Nylon\u003cbr\u003e\u003cbr\u003eItem Code. RF51500\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278042902760,"sku":"20117290","price":75.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/20117290_1.jpg?v=1776722460"},{"product_id":"series-60-core-block-halyard","title":"Ronstan Series 60 Core Block Halyard","description":"\u003cp\u003eThe Ronstan Series 60 Core Block is a class-leading halyard block engineered for direct attachment to a mainsail headboard for a 2:1 halyard setup. Featuring sleek, contemporary styling and a sophisticated bearing system, it delivers less than half the friction of the nearest competitor under both dynamic and high static loads. The removable 8mm threaded screw pin at the head and acetal roller allow for versatile spliced line attachment, while the central hub hole doubles as a becket take-off or tie-up point. An alloy rope\/wire sheave version is also available.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Single\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 60mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 2000 kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 1000 kg\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 186g\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 8mm\u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Full block rated load can only be achieved with uniformly distributed load across full length of screw pin — requires 14mm (9\/16\") diameter mast collar post or 14mm (9\/16\") wide mast collar plate\/tang.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eItem No. RF64108\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278042968296,"sku":"20117832","price":109.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/20117832_1.jpg?v=1776722474"},{"product_id":"ronstan-series-20-ball-bearing-triple-block-with-becket-shackle","title":"Ronstan Series 20 Ball Bearing Triple Block with Becket Shackle","description":"Engineered for high-performance sailing, the Ronstan Series 20 Ball Bearing Triple Block offers exceptional efficiency for demanding rigging systems. This compact block features precision-moulded Acetal sheaves paired with stainless steel ball bearings to ensure minimal friction under load. Built to withstand harsh marine environments, it utilizes a UV-stabilised sheave and a durable Grade 316 stainless steel load strap. The versatile two-way head can be locked at 0 or 90 degrees to suit various installation requirements. Ideally suited for powerful vang systems on dinghies and rig tensioning on high-speed skiffs, this block delivers reliable static and dynamic load capacity. Its lightweight, fibre-reinforced Nylon construction provides strength without adding unnecessary weight to your setup.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Triple Block with Becket\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 20mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 850kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 400kg\u003cbr\u003e\u003cstrong\u003eMaximum Rope Diameter:\u003c\/strong\u003e 6mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.064kg\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 4mm\u003cbr\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e Stainless steel, Acetal, Nylon\u003cbr\u003e\u003cbr\u003eItem Code. RF20312\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278043394280,"sku":"9316800255580","price":64.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800255580_1.jpg?v=1776722503"},{"product_id":"ronstan-series-55-orbit-block-single-with-becket-swivel-head","title":"Ronstan Series 55 Orbit Block Single with Becket Swivel Head","description":"The Series 55 Orbit Block delivers exceptional performance for mainsheet and spinnaker systems on dinghies, sports boats, and small keelboats up to 9 metres. Featuring a low-friction 2-stage orbital ball bearing system, this block offers the highest working load in its class while maintaining an ultra-lightweight profile. The integrated becket and swivelling shackle head provide versatile rigging options for halyard, vang, and backstay applications. Engineered with high-strength acetal ball bearings and a fibre-reinforced load frame, it ensures reliability under heavy stress. This compact block is meticulously designed to minimise mass and maximise efficiency for competitive sailing. Its robust construction provides consistent, smooth operation in demanding marine environments.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Single\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 55mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1000kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 500kg\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 10mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 88g\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cstrong\u003eFrame Material:\u003c\/strong\u003e Glass fibre reinforced Nylon\u003cbr\u003e\u003cbr\u003eItem No. RF55110\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278043787496,"sku":"9316800440405","price":67.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800440405_1.jpg?v=1776722509"},{"product_id":"ronstan-series-45-single-core-block-with-swivel-shackle-head","title":"Ronstan Series 45 Single Core Block with Swivel Shackle Head","description":"The Ronstan Series 45 Core Block is a high-performance single block with a swivel shackle head, engineered for both static and dynamic sailing loads. It features a robust 2-stage bearing system that significantly reduces friction under varying load conditions. The construction includes durable aluminium alloy cheek plates and a precision-engineered sheave for smooth line operation. Designed for reliability, this block is ideal for sheets, halyards, and control line applications in both cruising and racing environments. The central hub provides a versatile becket take-off point for added functionality.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Single\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 45mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1400 kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 700 kg\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 104g\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e Aluminium Alloy, Acetal, Grade 316 Stainless Steel\u003cbr\u003e\u003cbr\u003eItem Code. RF44100\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278044180712,"sku":"9316800466153","price":85.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800466153_1.jpg?v=1776722549"},{"product_id":"ronstan-series-20-ball-bearing-triple-block-with-becket-and-cleat","title":"Ronstan Series 20 Ball Bearing Triple Block with Becket and Cleat","description":"The Ronstan Series 20 Ball Bearing Triple Block is engineered for high performance and low friction. Featuring precision-moulded Acetal sheaves running on stainless steel or Torlon® ball bearings, this block ensures smooth handling under load. It includes a versatile two-way head, adjustable to 0 or 90 degrees, and a durable Grade 316 stainless steel load strap. The fibre-reinforced Nylon cheeks provide impact and UV resistance for long-term reliability. Ideally suited for control lines, this block delivers high static and dynamic load capacity in a lightweight design.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 20 mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 850 kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 400 kg\u003cbr\u003e\u003cstrong\u003eMaximum Rope diameter:\u003c\/strong\u003e 6 mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 122 g\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 4 mm\u003cbr\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e Stainless steel, Acetal, Grade 316 stainless steel, fibre reinforced Nylon\u003cbr\u003e\u003cbr\u003eItem Code. RF20332\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278044377320,"sku":"9316800255764","price":95.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800255764_1.jpg?v=1776722555"},{"product_id":"ronstan-series-50-all-purpose-double-block-with-becket-50mm","title":"Ronstan Series 50 All Purpose Double Block with Becket 50mm","description":"Designed for both cruising and racing, the Ronstan Series 50 All Purpose double block with becket delivers exceptionally high working loads and reliable performance. Built with a self-lubricating Acetal polymer sheave, it ensures minimal friction and long-term durability. The Grade 316 stainless steel load strap provides superior strength, while fibre-reinforced nylon cheeks offer impact and UV resistance. A slotted pin shackle design effectively prevents fouled lines during operation. The becket pin is easily removable without tools, allowing for simple line splicing.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Double\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 50mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 2000kg\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 1000kg\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.271kg\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 6mm\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Grade 316 Stainless Steel, Fibre Reinforced Nylon\u003cbr\u003e\u003cbr\u003eItem Code. RF51210\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278044475624,"sku":"9316800241255","price":99.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800241255_1.jpg?v=1776722559"},{"product_id":"ronstan-series-45-core-block-halyard-swivel-fork-45mm-sheave","title":"Ronstan Series 45 Core Block Halyard Swivel Fork 45mm Sheave","description":"The Ronstan Series 45 Core Block is engineered for high-performance halyard and control line applications. Featuring a sophisticated 2-stage bearing system, it ensures minimal friction under both moderate and heavy loads. The durable aluminium alloy cheek plates are complemented by a U.V. stabilised acetal sheave for long-term reliability. Its low-profile swivel head fork includes a removable screw pin, allowing for versatile attachment to padeyes. Designed for boats up to 10 metres, this block provides exceptional static and dynamic load capacity for racing and cruising.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 45mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1400kg\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 700kg\u003cbr\u003e\u003cstrong\u003eMax Rope diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 121g\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e Aluminium alloy, Acetal, Stainless steel\u003cbr\u003e\u003cbr\u003eItem Code. RF44188\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278044541160,"sku":"9316800484669","price":99.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800484669_1.jpg?v=1776722565"},{"product_id":"ronstan-series-50-all-purpose-block-with-becket-50mm-sheave","title":"Ronstan Series 50 All Purpose Block with Becket 50mm Sheave","description":"High-performance single block featuring a removable becket pin for versatile rigging applications. The self-lubricating Acetal polymer sheave ensures minimal friction and long-lasting durability under significant loads. Equipped with a Captive Lock universal head, this block can be fixed in two planes or left to swivel as required. The grade 316 stainless steel load strap provides exceptional strength, making it ideal for sheets, halyards, and control lines. Designed for both cruising and competitive racing, the slotted pin shackle eliminates line fouling to ensure consistent performance. It offers a robust, low-maintenance solution for demanding marine environments.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 50mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1500kg\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 750kg\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.134kg\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Grade 316 Stainless Steel, Acetal Polymer, Fibre Reinforced Nylon\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278044606696,"sku":"9316800241088","price":61.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800241088_1.jpg?v=1776722576"},{"product_id":"ronstan-series-30-ball-bearing-double-orbit-block-30mm-sheave","title":"Ronstan Series 30 Ball Bearing Double Orbit Block 30mm Sheave","description":"The Series 30 Ball Bearing Orbit Block delivers an exceptional strength-to-weight ratio for high-performance sailing. Engineered with advanced fibre-reinforced composites, this double sheave block features a low-friction 2-stage ball bearing system for consistent, reliable performance under load. Its low-profile design includes a thru-sheave becket for secure, versatile attachment options. Ideal for demanding racing conditions, the block is constructed from high-compression acetal and UV-stabilised materials for maximum durability. Experience efficient rope handling and minimal friction in a lightweight, compact package.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Double\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 30mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 900kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 450kg\u003cbr\u003e\u003cstrong\u003eMaximum Rope Diameter:\u003c\/strong\u003e 8mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.056kg\u003cbr\u003e\u003cstrong\u003eSheave Material:\u003c\/strong\u003e Carbon black Acetal\u003cbr\u003e\u003cstrong\u003eFrame Material:\u003c\/strong\u003e Glass fibre reinforced Nylon\u003cbr\u003e\u003cbr\u003eItem Code. RF35202\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278044836072,"sku":"9316800404971","price":61.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800404971_1.jpg?v=1776722582"},{"product_id":"ronstan-series-30-double-ball-bearing-orbit-block-with-becket","title":"Ronstan Series 30 Double Ball Bearing Orbit Block with Becket","description":"Engineered for peak performance, this lightweight double sheave block features a high-efficiency 2-stage ball bearing system to minimise friction under heavy loads. The reinforced polymer frame and acetal components provide exceptional strength-to-weight performance for demanding marine environments. Designed with an ultra-low profile through-sheave becket, it offers secure and versatile attachment for various control lines. This block supports mainsheet systems, halyards, and vang applications on boats up to 5 metres. It delivers consistent performance across the full working load range for reliable, long-term operation.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 30mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 900kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 450kg\u003cbr\u003e\u003cstrong\u003eMaximum Rope Diameter:\u003c\/strong\u003e 8mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 57g\u003cbr\u003e\u003cstrong\u003eSheave Material:\u003c\/strong\u003e Acetal\u003cbr\u003e\u003cstrong\u003eBearing Type:\u003c\/strong\u003e 2-stage ball bearing\u003cbr\u003e\u003cstrong\u003eFrame Material:\u003c\/strong\u003e Glass fibre reinforced Nylon\u003cbr\u003e\u003cbr\u003eItem Code. RF35212\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278044934376,"sku":"9316800404988","price":62.9,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800404988_1.jpg?v=1776722593"},{"product_id":"ronstan-series-40-all-purpose-double-block-with-becket","title":"Ronstan Series 40 All Purpose Double Block with Becket","description":"The Ronstan Series 40 All Purpose Block features self-lubricating Acetal polymer sheaves running on polished stainless steel races for consistent performance under both dynamic and high static loads. Ideal for sheets, halyards, and control line applications, this double block provides exceptional durability and a long service life. The integrated becket pin is removable, allowing lines to be spliced prior to fitting. This pin is ingeniously locked into position without requiring tools, clevis pins, or split rings. Designed for both cruising and racing, this hardware ensures reliable operation in demanding sailing conditions.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Double\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 40mm\u003cbr\u003e\u003cstrong\u003eMaximum Rope Diameter:\u003c\/strong\u003e 10mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1200kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 600kg\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.143kg\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cbr\u003eItem Code. RF41210\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278045098216,"sku":"9316800557417","price":66.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800557417_1.jpg?v=1776722600"},{"product_id":"ronstan-series-50-stand-up-block-single-sheave","title":"Ronstan Series 50 Stand-Up Block Single Sheave","description":"The Ronstan Series 50 All Purpose Stand-Up Block delivers high performance and durability for demanding marine applications. Engineered with a self-lubricating Acetal polymer sheave, this block provides exceptionally low friction and extended service life. The construction features a grade 316 stainless steel load strap paired with impact-resistant, fibre-reinforced Nylon cheeks for superior strength. Designed for versatility, the Captive Lock universal head adjusts to two planes or swivels freely to suit specific rigging requirements. This unit includes a saddle and spring, making it ideal for direct 4:1 purchase systems like mainsheets and boom vangs. Its slotted pin shackle design effectively prevents line fouling during operation.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Stand-Up\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 50mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1000kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 500kg\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.118kg\u003cbr\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e Grade 316 Stainless Steel, Fibre Reinforced Nylon\u003cbr\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Mainsheets, boom vangs, control lines\u003cbr\u003e\u003cbr\u003eItem Code. RF51140\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278045130984,"sku":"9316800334599","price":69.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800334599_1.jpg?v=1776722605"},{"product_id":"ronstan-series-20-ball-bearing-pivoting-lead-block-small-c-cleat-fairlead","title":"Ronstan Series 20 Ball Bearing Pivoting Lead Block Small C-Cleat Fairlead","description":"Swivel cleat bases allow for easy cleating and releasing from any angle. The sheave can be relocated to enable control lines to be fed from below. Designed with 316 stainless steel ball bearings and a UV-stabilised Acetal sheave for durability. Suitable for sheet leads and halyards on dinghies and catamarans.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 20mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 300kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 150kg\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 79g\u003cbr\u003e\u003cstrong\u003eRope Diameter:\u003c\/strong\u003e 2-6mm\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e 316 Stainless Steel\u003cbr\u003e\u003cstrong\u003eSheave Material:\u003c\/strong\u003e UV Stabilised Acetal\u003cbr\u003e\u003cbr\u003eItem Code. RF20175\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278045425896,"sku":"9316800273324","price":79.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800273324_1.jpg?v=1776722624"},{"product_id":"ronstan-series-50-all-purpose-double-block-with-swivel-head","title":"Ronstan Series 50 All Purpose Double Block with Swivel Head","description":"The Ronstan Series 50 All Purpose double block is engineered for high-performance sailing applications, featuring a self-lubricating Acetal polymer sheave that ensures minimal friction under both dynamic and static loads. Constructed with a grade 316 stainless steel load strap and durable, fibre-reinforced nylon cheeks, this block delivers exceptional longevity in demanding marine environments. The integrated slotted pin shackle effectively prevents line fouling, while the swivel head allows for full 360-degree rotation. 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RF51200\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278045458664,"sku":"9316800241231","price":82.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800241231_1.jpg?v=1776722630"},{"product_id":"ronstan-series-55-orbit-blocka-fiddle-link-head-55mm-sheave","title":"Ronstan Series 55 Orbit Block Fiddle Link Head 55mm","description":"The Ronstan Series 55 Orbit Block Fiddle with Link Head delivers class-leading working loads in an ultra-compact, low-profile package. The main sheave features a low-friction 2-stage orbital ball bearing system for smooth, efficient performance under both dynamic and static loads, while the small fiddle sheave uses a high-load full contact bearing for maximum strength. The easily fitted Dyneema® Link head provides a secure, reliable attachment point for versatile rigging configurations. Ideal for mainsheet, spinnaker, and control line systems on dinghies and sports boats.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eType of Block:\u003c\/strong\u003e Fiddle with Link Head\u003cbr\u003e\u003cstrong\u003eMain Sheave Bearing:\u003c\/strong\u003e 2-stage orbital ball bearing\u003cbr\u003e\u003cstrong\u003eFiddle Sheave Bearing:\u003c\/strong\u003e High-load full contact bearing\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1000 kg\u003cbr\u003e\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 500 kg\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 10mm\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 95g\u003cbr\u003e\u003cstrong\u003eHead Type:\u003c\/strong\u003e Dyneema® Link\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278045556968,"sku":"9316800373505","price":78.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800373505_1.jpg?v=1776722641"},{"product_id":"ronstan-series-40-all-purpose-fiddle-block-with-becket","title":"Ronstan Series 40 All Purpose Fiddle Block with Becket","description":"The Series 40 All Purpose Fiddle Block with Becket offers reliable performance for demanding sailing applications. Featuring a self-lubricating Acetal sheave and stainless steel races, this block handles both dynamic and static loads with ease. The Captive Lock universal head allows for fixed or swiveling operation, while the snap-fit removable becket pin simplifies line splicing. Designed for durability, it uses UV-stabilised materials and high-strength fibre-reinforced nylon cheeks. 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RF41510\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48278045786344,"sku":"9316800244157","price":67.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800244157_1.jpg?v=1776722652"},{"product_id":"ronstan-fiddle-block-snap","title":"Ronstan S60 Fiddle Block Snap Shackle Head","description":"\u003cp\u003eRonstan fiddle blocks are ideal for mainsheet tackles, boom vangs, backstays, and other multiple purchase control line systems. The universal head can be fixed at 0° or 90°, or left free to swivel for versatile rigging configurations. 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Engineered for excellent dynamic and high static load performance with less than half the friction of the nearest competitor. Scalloped cheeks allow for variations in line lead, and only two fastener holes minimise deck sealing considerations. Alloy sheave models available for use with wire.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Mainsheet, spinnaker sheet, vang, halyard and backstay on boats to 14m (46ft); general applications on larger yachts\u003cbr\u003e\u003cstrong\u003eSheave:\u003c\/strong\u003e UV stabilised acetal (3\" diameter)\u003cbr\u003e\u003cstrong\u003eCheek Plates:\u003c\/strong\u003e Aluminium alloy, scalloped\u003cbr\u003e\u003cstrong\u003eBall Bearings:\u003c\/strong\u003e High compression strength carbon black acetal\u003cbr\u003e\u003cstrong\u003eHub:\u003c\/strong\u003e Grade 316 stainless steel\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 9\/16\"\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 3,300 lb\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 6,600 lb\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 9.2 oz\u003cbr\u003e\u003cstrong\u003eFastener:\u003c\/strong\u003e 2 x 3\/8\" (10mm) fasteners required (not supplied)\u003cbr\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF74151\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48386979528936,"sku":"9316800445868","price":155.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800445868_1.jpg?v=1777284018"},{"product_id":"ronstan-series-60-single-core-block","title":"Ronstan Series 60 Single Core Block","description":"\u003cp\u003eThe Ronstan Series 60 Core Block™ Single is a true all-round solution for sheets, halyards, and control line applications on cruising and racing yachts. A tuned 2-stage bearing system delivers class-leading performance across the full working load range — under moderate loads, acetal ball bearings ensure minimum friction; under heavy loads, a sliding acetal bearing on a polished stainless steel race takes over to maintain low friction. An integrated thrust bearing prevents the sheave from rubbing on the cheeks when the line lead isn't perfect.\u003c\/p\u003e\u003cp\u003eThe universal head provides full 3-axis articulation and can be locked at 0° or 90° using a 2.5mm hex key, or left free to swivel. The central hub doubles as a becket take-off or tie-up point for lines up to 11.5mm. Alloy cheek plates are cut-away for minimum weight and easy fresh water rinsing. An alloy sheave version for wire rope is also available.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSheave:\u003c\/strong\u003e UV stabilised acetal (2-3\/8\" diameter)\u003cbr\u003e\u003cstrong\u003eCheek Plates:\u003c\/strong\u003e Aluminium alloy, cut-away design\u003cbr\u003e\u003cstrong\u003eBall Bearings:\u003c\/strong\u003e High compression strength carbon black acetal\u003cbr\u003e\u003cstrong\u003eShackle, Post \u0026amp; Hub:\u003c\/strong\u003e Grade 316 stainless steel\u003cbr\u003e\u003cstrong\u003eHead:\u003c\/strong\u003e Universal, full 3-axis articulation — lockable at 0° or 90° (2.5mm hex key)\u003cbr\u003e\u003cstrong\u003eHub:\u003c\/strong\u003e Becket take-off or tie-up point, max 11.5mm line\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 1\/2\"\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 1\/4\"\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 2,200 lb\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 4,410 lb\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 8.3 oz\u003cbr\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF64100\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48387487957224,"sku":"9316800446070","price":135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800446070_1_4eb813ca-d7f1-4d41-bfb6-ff54b36f3322.jpg?v=1777287733"},{"product_id":"ronstan-series-30-orbit-block-triple-with-becket-cleat","title":"Ronstan Series 30 Orbit Block Triple With Becket \u0026 Cleat","description":"\u003cp\u003eThe Ronstan Series 30 Ball Bearing Orbit Block™ Triple with Becket \u0026amp; Cleat delivers the highest strength-to-weight ratio available in its class. All-composite fibre-reinforced polymer construction eliminates heavy steel components, achieving the lowest possible weight without compromising load capacity. The proven Ronstan 2-stage bearing system — high compression acetal ball bearings combined with a secondary full-contact bearing — provides minimum friction across the full working load range.\u003c\/p\u003e\u003cp\u003eThe race-proven carbon-fibre reinforced C-Cleat™ offers secure rope holding with low entry and exit effort, fitted with a fairlead for fast action from any angle. The ultra-low profile through-sheave becket minimises height, and the Dyneema® Link provides simple, versatile, and secure attachment — easily replaced with a shackle, custom lashing, or strop. SP versions feature a Nylatron® sheave suitable for both rope and wire.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e Triple sheave, becket, C-Cleat™, fairlead, non-swivel shackle head\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 1-3\/16\"\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 5\/16\"\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 1,210 lb\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 2,430 lb\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.7 oz\u003cbr\u003e\u003cstrong\u003eBecket:\u003c\/strong\u003e Suits up to 6mm (1\/4\") line — use Dyneema® link for lines above 6mm (sold separately)\u003cbr\u003e\u003cstrong\u003eBecket Load:\u003c\/strong\u003e Not to exceed 25% of block load\u003cbr\u003e\u003cstrong\u003eSystem Rating:\u003c\/strong\u003e Suitable for 6:1 system at rated block load\u003cbr\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF35332\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48387844047080,"sku":"9316800405022","price":128.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800405022_1.jpg?v=1777284012"},{"product_id":"ronstan-series-40-ball-bearing-triple-block","title":"Ronstan Series 40 Ball Bearing Triple Block","description":"\u003cp\u003eThe Ronstan Series 40 Ball Bearing Block Triple is a lightweight triple sheave block with a swivel shackle head for full 360° rotation. Acetal ball bearings running on UV stabilised acetal sheaves provide high performance and low friction across the full working load range via a proven 2-stage bearing system. 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Self-lubricating acetal polymer sheaves running on polished grade 316 stainless steel races perform equally well under dynamic and high static loads for a long, low-maintenance service life. The Captive Lock™ universal head can be fixed in either of two planes or left free to swivel, and the multi-position cleat arm adjusts quickly without tools.\u003c\/p\u003e\u003cp\u003eSuited to mainsheet, halyard, vang, and spinnaker control line applications on off-the-beach catamarans, one-design classes, and sportsboats up to 8m (26ft). 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Self-lubricating acetal sheaves deliver consistent performance under both dynamic and static loads. The Captive Lock™ universal head can be fixed in either of two planes or left free to swivel, and the multi-position cleat arm adjusts quickly without tools. 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The slotted pin swivel shackle head eliminates fouled lines, and the two-way head post adds versatility. 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Easily fitted and securely retained with Dyneema link head. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF45211\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 40mm\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 8mm\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 500kg\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1,000kg\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 72g\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48470345908456,"sku":"9316800393572","price":79.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800393572_1.jpg?v=1777718036"},{"product_id":"ronstan-series-50-all-purpose-fiddle-block","title":"Ronstan Series 50 All Purpose Fiddle Block","description":"\u003cp\u003eThe Ronstan Series 50 All Purpose Fiddle Block features a self-lubricating Acetal polymer sheave running on polished stainless steel races, performing equally well under dynamic and high static loads. The Captive Lock™ universal head can be fixed in either of two planes or left free to swivel as required, and the slotted pin shackle eliminates fouled lines. 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The unique orbital design places bearings only in the active areas of the floating sheave, minimising mass in the inactive return race and hub. The floating sheave and bearing system is supported by a computer-modelled, stress-optimised fibre-reinforced load frame. 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The Captive Lock™ universal head can be fixed in either of two planes or left free to swivel as required, and the slotted pin shackle eliminates fouled lines. Suited to mainsheet, halyard, vang and spinnaker control line applications on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft), as well as fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF41500\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Fiddle, Captive Lock™ universal head\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 40mm\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 8mm\u003cbr\u003e\u003cstrong\u003ePin Diameter:\u003c\/strong\u003e 5mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1,000kg\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 400kg\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 91g\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003cbr\u003e- Sheave: UV stabilised Acetal polymer\u003cbr\u003e- Bearing race: Grade 316 stainless steel\u003cbr\u003e- Load strap and head fitting: Grade 316 stainless steel\u003cbr\u003e- Cheeks: Impact and UV resistant, fibre reinforced nylon\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48470395912424,"sku":"9316800244126","price":59.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800244126_1.jpg?v=1777720117"},{"product_id":"ronstan-series-20-ball-bearing-triple-block-with-shackle","title":"Ronstan Series 20 Ball Bearing Triple Block With Shackle","description":"\u003cp\u003eThe Ronstan Series 20 Ball Bearing Triple Block features precision moulded Acetal sheaves running on stainless steel ball bearings for high performance and low friction under both high static and dynamic loads. 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Swivel shackle head (non-locking). 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The Captive Lock™ universal head can be fixed in either of two planes or left free to swivel as required, and the slotted pin shackle eliminates fouled lines. 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The Captive Lock™ universal head can be fixed in either of two planes or left free to swivel as required. Suited to sheets, halyards and control line applications for cruising and racing. 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The dual axis head can be fixed at 0 or 90 degrees depending on application. 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Aluminium cheeks. Can be mounted on masts and booms using a curved surface adapter. Can be stacked to create a double version — no more than 50% of rated working load should be applied to the upper sheave. Suited to mainsheet, halyard, vang and spinnaker control line applications on boats to 10m (33ft). Fasteners not supplied.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eItem Code:\u003c\/strong\u003e RF51151\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Cheek\/foot block, single sheave\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 50mm\u003cbr\u003e\u003cstrong\u003eMax Rope Diameter:\u003c\/strong\u003e 12mm\u003cbr\u003e\u003cstrong\u003eFasteners Required:\u003c\/strong\u003e 3 x 6mm (1\/4\") — not supplied\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 1,000kg\u003cbr\u003e\u003cstrong\u003eMax Working Load:\u003c\/strong\u003e 500kg\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 85g\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003cbr\u003e- Cheeks: Aluminium\u003cbr\u003e- Sheave: UV stabilised Acetal polymer\u003c\/p\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48486754320616,"sku":"9316800246656","price":39.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800246656_1.jpg?v=1777894231"},{"product_id":"ronstan-series-20-ball-bearing-in-line-double-block","title":"Ronstan Series 20 Ball Bearing In-Line Double Block","description":"\u003cp\u003eThe Ronstan Series 20 Ball Bearing In-Line Double Block features precision moulded Acetal sheaves running on stainless steel or Torlon® ball bearings for high performance and low friction under both dynamic and high static loads. 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The snap-fit removable becket pin allows line to be spliced prior to fitting and locks into position without a clevis pin, split ring or tools. 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Lightweight, economical and maintenance free. Ideal for vang, cunningham and trapeze retriever systems on dinghies, and leech line tackles and bunk adjusters on larger yachts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart No.:\u003c\/strong\u003e RF81\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Double, loop head\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 30mm\u003cbr\u003e\u003cstrong\u003eMax. Rope Diameter:\u003c\/strong\u003e 8mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 600kg\u003cbr\u003e\u003cstrong\u003eMax. 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Requires 3 x 4mm (5\/32”) countersunk head fasteners.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eUltra Lightweight\u003c\/strong\u003e\u003cbr\u003eKilogram for kilogram of working load, Ronstan Orbit Blocks™ are the world’s lightest. The unique orbital design places bearings only in the active areas of the floating sheave, minimising mass. Results in a 30% weight saving advantage over the nearest competitor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHighest Working Load in Class\u003c\/strong\u003e\u003cbr\u003eThe orbital ball-bearing arrangement maximises bearing race diameter for peak load performance. The proven 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing, giving minimum friction across the full working load range. The floating sheave and bearing system is supported by a computer-modelled, stress-optimised fibre-reinforced load frame.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003cbr\u003e- Mainsheet and spinnaker sheets on dinghies to 5m (16ft)\u003cbr\u003e- Halyard, vang and backstay on boats to 8m (26ft)\u003cbr\u003e- Control line applications on larger yachts\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart No.:\u003c\/strong\u003e RF45151\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Cheek \/ foot\u003cbr\u003e\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 40mm\u003cbr\u003e\u003cstrong\u003eMax. Rope Diameter:\u003c\/strong\u003e 9mm\u003cbr\u003e\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 700kg\u003cbr\u003e\u003cstrong\u003eMax. 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