{"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","url":"https:\/\/boatharbourmarine.com.au\/products\/ronstan-series-50-stand-up-block-single-sheave","provider":"Boat Harbour Marine","version":"1.0","type":"link"}