{"product_id":"ronstan-rf28100","title":"Ronstan Series 25 Ball Bearing Orbit Block\u0026trade; - Becket \u0026amp; Swivel Shackle","description":"\u003cdiv class=\"dna-desc\"\u003e\n\u003cp\u003eSeries 25 Ball Bearing Orbit Block\u0026amp;trade; - Becket \u0026amp;amp; Swivel Shackle Single sheave ball bearing block with becket hub and swivel shackle head.\u0026amp;nbsp; Series 25 Ball Bearing Orbit Blocks\u0026amp;trade;, delivering superior strength, reduced weight, and exceptional performance for high-demand dinghy and small boat applications. Designed with competitive sailors and performance boats in mind, these compact 25mm blocks are engineered to achieve the highest possible strength-to-weight ratio. Featuring Ronstan\u0026amp;rsquo;s renowned high compression strength acetal bearing system, the Series 25 BB Orbit Blocks\u0026amp;trade; are a lightweight yet durable solution, ideal for control line systems such as mainsheet and spinnaker sheet turning blocks, cunninghams, and cascading vangs on dinghies up to 4 meters. Each block has a stainless steel hub for versatile lashing attachments and through-sheave becket functionality, making them adaptable to a wide range of rigging setups. The hub accommodates up to 4mm (5\/32\u0026amp;quot;) lashing and ensures maximum efficiency without compromising reliability. Features: 2-stage ball bearing system. Suits up to 8mm (5\/16\u0026amp;rdquo;) lines. Hollow hub for becket take-off. Lashing blocks suit up to 4mm (5\/32\u0026amp;rdquo;) lashing. Specifications: Max. Rope diameter (in): 5\/16 M.W.L. (lb): 500 Sheave diameter (in): 1 B.L. (lb): 990 Weight (oz): 0.6 Applications: Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft). Control lines. Cascading vangs. Leech lines \u0026amp;amp; cunninghams. Materials: Frame\/cheeks: Toughened, glass fibre reinforced nylon. \u0026amp;nbsp; BB Sheave and balls: high compression strength acetal.\u003c\/p\u003e\n\u003ctable class=\"dna-spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRonstan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eRF28100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUPC \/ GTIN\u003c\/th\u003e\n\u003ctd\u003e9316800661916\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e0.02 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c\/th\u003e\n\u003ctd\u003eTowing \u0026amp; Hitches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCondition\u003c\/th\u003e\n\u003ctd\u003eNew — genuine brand-name product\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cdiv class=\"dna-note\"\u003e\n\u003cstrong\u003eGenuine brand-name product, full manufacturer warranty.\u003c\/strong\u003e Ships from the closest US warehouse — normally within 1–3 business days. Questions before you order? Send us the manufacturer part number above and we’ll confirm. 30-day returns on unused items.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":53162496753945,"sku":"110653","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0991\/9437\/2377\/files\/110653XL.jpg?v=1789304106","url":"https:\/\/dnaautoco.com\/products\/ronstan-rf28100","provider":"DNA Auto","version":"1.0","type":"link"}