{"product_id":"ronstan-series-20-ball-bearing-upright-lead-block","title":"Ronstan Series 20 Ball Bearing Upright Lead Block","description":"\u003cp\u003eThe Ronstan RF20171 is a Series 20 ball bearing single upright lead block — a low-profile solution for leading halyards or other rig sail controls back to cleats or jammers. Typically used for halyards at the mast base.\u003c\/p\u003e\u003cp\u003ePrecision moulded UV-stabilised Acetal sheave running on Grade 316 stainless steel ball bearings delivers high performance and low friction. Grade 316 stainless steel load housing throughout.\u003c\/p\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003e- Type: Upright Lead Block\u003cbr\u003e- Sheave Diameter: 20mm\u003cbr\u003e- Maximum Rope Diameter: 6mm\u003cbr\u003e- Breaking Load: 550kg\u003cbr\u003e- Maximum Working Load: 250kg\u003cbr\u003e- Fastener Diameter: 4mm (suits 2 x 4mm \/ 5\/32\" fasteners)\u003cbr\u003e- Weight: 18g\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003cbr\u003e- Sheave: UV-stabilised Acetal\u003cbr\u003e- Bearings: Grade 316 stainless steel ball bearings\u003cbr\u003e- Load Housing: Grade 316 stainless steel\u003cbr\u003e\u003cbr\u003eItem Code. RF20171","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":48581982093544,"sku":"9316800255597","price":20.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/9065\/8280\/files\/9316800255597_1.jpg?v=1779522485","url":"https:\/\/boatharbourmarine.com.au\/products\/ronstan-series-20-ball-bearing-upright-lead-block","provider":"Boat Harbour Marine","version":"1.0","type":"link"}