{"title":"Ronstan Upright Lead Blocks","description":"","products":[{"product_id":"ronstan-upright-lead-block-22mm-nylatron-sheave","title":"Ronstan Upright Lead Block 22mm Nylatron Sheave","description":"\u003cp\u003e\u003cstrong\u003eRonstan Upright Lead Block 22mm Nylatron Sheave\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.\u003c\/p\u003e\n\u003cp\u003eWhen mounted in an inverted position, are frequently used as upright leads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe external tabs can be formed to fit the spar profile before fastening\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 1\/8\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 7\/8\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 3\/16\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNylatron sheave. Grade 316 stainless steel load housing\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53594374242676,"sku":"RONRF453","price":32.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF453-2T__43406.jpg.1428984928.jpg?v=1761730355"},{"product_id":"ronstan-upright-lead-block-narrow-19mm-sheave","title":"Ronstan Upright Lead Block Narrow 19mm Sheave","description":"\u003cp\u003e\u003cstrong\u003eRonstan Upright Lead Block Narrow 19mm Sheave\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.\u003c\/p\u003e\n\u003cp\u003eWhen mounted in an inverted position, are frequently used as upright leads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemovable sheave\u003c\/li\u003e\n\u003cli\u003eThe external tabs can be formed to fit the spar profile before fastening\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 3\/16\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 3\/16\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheave. Grade 316 stainless steel load housing\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53594479362420,"sku":"RONRF568","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF568-2T__89562.jpg.1428984928.jpg?v=1761730524"},{"product_id":"ronstan-upright-lead-block-wide-19mm-sheave","title":"Ronstan Upright Lead Block Wide 19mm Sheave","description":"\u003cp\u003e\u003cstrong\u003eRonstan Upright Lead Block Wide 19mm Sheave\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.\u003c\/p\u003e\n\u003cp\u003eWhen mounted in an inverted position, are frequently used as upright leads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe external tabs can be formed to fit the spar profile before fastening\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 5\/16\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 3\/16\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheave. Grade 316 stainless steel load housing\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53594479624564,"sku":"RONRF569","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF569-2T__00698.jpg.1428984928.jpg?v=1761730525"},{"product_id":"ronstan-upright-lead-block-19mm-acetal-sheave","title":"Ronstan Upright Lead Block, 19mm Acetal Sheave","description":"\u003cp\u003e\u003cstrong\u003eRonstan Upright Lead Block, 19mm Acetal Sheave\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. Rope diameter (in): 5\/16\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 3\/4\u003c\/li\u003e\n\u003cli\u003eFastener Ø (in): 3\/16\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheave.\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load housing\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan Sailboat Hardware","offers":[{"title":"Default Title","offer_id":53594591592820,"sku":"RONRF917","price":17.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/RONRF917-2T__18194.jpg.1428984928.jpg?v=1761730717"},{"product_id":"ronstan-upright-lead-block-29mm-acetal-sheave","title":"Ronstan Upright Lead Block, 29mm Acetal Sheave","description":"\u003cp\u003e\u003cstrong\u003eRonstan Upright Lead Block, 29mm Acetal Sheave\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMax. 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