![Ronstan Series 20 Ball Bearing Block- Single, Stand-Up Loop Top [RF20141]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/1280x1280/products/27994/36315/70783XL__32329.1646191370.jpg?c=1 "Ronstan Series 20 Ball Bearing Block- Single, Stand-Up Loop Top [RF20141]")
![Ronstan Series 20 Ball Bearing Block- Single, Stand-Up Loop Top [RF20141]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/27994/36315/70783XL__32329.1646191370.jpg?c=1 "Ronstan Series 20 Ball Bearing Block- Single, Stand-Up Loop Top [RF20141]")
Series 20 Ball Bearing Block- Single, Stand-Up Loop Top
Features:
- Low friction
- High static and dynamic load capacity
- Lightweight
Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction.
Applications:
- Dinghy control lines
- Dinghy vangs
- Cunninghams
- Traveler controls
Materials:
- Stainless steel ball bearings
- UV stabilized Acetal sheave
- Grade 316 stainless steel load strap and head fitting
- Impact and UV resistant, fiber reinforced Nylon cheeks
![Ronstan Series 30 Ball Bearing Block - Single - Loop Top [RF30101]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/35703/48462/55171XL__78152.1694444445.jpg?c=1 "Ronstan Series 30 Ball Bearing Block - Single - Loop Top [RF30101]")
![Ronstan Series 50 Ball Bearing Block - Single Loop Top [RF50101]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/39426/54297/105700XL__22775.1726010608.jpg?c=1 "Ronstan Series 50 Ball Bearing Block - Single Loop Top [RF50101]")
![Ronstan Series 20 Ball Bearing Block - Single [RF20100]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/17563/21899/55131XL__28346.1638826580.jpg?c=1 "Ronstan Series 20 Ball Bearing Block - Single [RF20100]")
![Ronstan Series 15 Ball Bearing Utility Block - Single Block, Loop Head [RF15101]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/28006/36327/71020XL__18759.1646191527.jpg?c=1 "Ronstan Series 15 Ball Bearing Utility Block - Single Block, Loop Head [RF15101]")
![Ronstan Series 30 Block - Single - Loop Top [RF280]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/27425/35454/55161XL__32115.1646182362.jpg?c=1 "Ronstan Series 30 Block - Single - Loop Top [RF280]")
![Ronstan Series 30 Ball Bearing Orbit Block - Stand Up Swivel [RF35140]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/27437/35466/55175XL__84856.1646182394.jpg?c=1 "Ronstan Series 30 Ball Bearing Orbit Block - Stand Up Swivel [RF35140]")
![Ronstan Series 20 Ball Bearing Block - Single - Cheek Rivet Mount [RF20151A]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/27408/35437/55136XL__34563.1646182314.jpg?c=1 "Ronstan Series 20 Ball Bearing Block - Single - Cheek Rivet Mount [RF20151A]")
![Ronstan Series 40 Orbit Single BB Single Stand-Up Block [RF48140]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/32591/43058/97310XL__20592.1667856471.jpg?c=1 "Ronstan Series 40 Orbit Single BB Single Stand-Up Block [RF48140]")
![Ronstan Series 40 All Purpose Block - Single - Stand Up [RF41140]](https://cdn11.bigcommerce.com/s-akrdq0rr06/images/stencil/500x659/products/27459/35488/55205XL__33965.1646182454.jpg?c=1 "Ronstan Series 40 All Purpose Block - Single - Stand Up [RF41140]")