![Ronstan Series 15 Ball Bearing Utility Block - Single, Swivel Shackle Head [RF15100]](http://cdn.shopify.com/s/files/1/0070/5150/9875/products/71019XL_{width}x.jpg?v=1599462869)
Series 15 Ball Bearing Utility Block - Single, Swivel Shackle 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