![Ronstan Series 15 Ball Bearing Utility Block - Double, Loop Head [RF15202] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/71027XL_650x.jpg?v=1677097346)
Product Details
Series 15 Ball Bearing Utility Block - Double, 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
![Ronstan Series 30 Utility Block - Cheek, Curved Base [RF285] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/72300XL_{width}x.jpg?v=1677097760)
![Ronstan Series 20 Ball Bearing Block - Single [RF20100] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/55131XL_{width}x.jpg?v=1677092454)
![Ronstan Series 40 All Purpose Block - Single - Universal Head [RF41100] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/55201XL_{width}x.jpg?v=1677092491)
![Ronstan Swivel Cleat & Base [RF5] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/55232XL_{width}x.jpg?v=1677092511)
![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)
![Schaefer Series 5 Flat Base/Alum Cheek/Delrin Sheave [504-11] - Rough Seas Marine](http://roughseasmarine.com/cdn/shop/products/74716XL_{width}x.jpg?v=1677098770)
