![Ronstan Series 15 Ball Bearing Utility Block - Single Block, Loop Head [RF15101] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/71020XL_650x.jpg?v=1677097340)
Product Details
Series 15 Ball Bearing Utility Block - Single Block, Loop Head
Features:
- Smallest and lightest ball bearing block available
- Precision molded acetal sheave running on stainless steel ball bearings provide high performance & low friction
- Single loop head blocks include an O-ring to separate running line from head lashing or fixing
Applications:
- Dinghy control lines
- Vangs, cunninghams and tweakers
- Shock cord tensioning systems
Materials:
- BB sheaves: UV stabilized acetal
- Ball bearings: Stainless steel
- Cheeks: Grade 316 stainless steel
![Lewmar 60mm HTX Block - Single [29196001] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/94311XL_{width}x.jpg?v=1677108060)
![Schaefer Clamp-On Furling Line Stanchion Lead Block - 1" Ball Bearing [300-34] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/74705XL_{width}x.jpg?v=1677098762)
![Ronstan Series 50 All Purpose Block - Single - Universal Head [RF51100] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/55253XL_{width}x.jpg?v=1677092525)
![Ronstan Series 40 All Purpose Block - Single - Stand Up [RF41140] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/55205XL_{width}x.jpg?v=1677092494)
![Ronstan Series 30 Ball Bearing Orbit Block - Single - Becket - Swivel Shackle Head [RF35100] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/55173XL_{width}x.jpg?v=1677092478)
![Ronstan Series 20 Ball Bearing Orbit Block - Single - Dyneema Lashing - Becket Option [RF25109] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/55155XL_{width}x.jpg?v=1677092467)
![Lewmar 72mm Synchro Block - Single [29927201BK] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/94303XL_{width}x.jpg?v=1677108057)
