![Ronstan Series 40 Ball Bearing Block - Double - Swivel Head [RF40200]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/1280x1280/products/17897/21109/70616XL__09953.1601532777.jpg?c=2 "Ronstan Series 40 Ball Bearing Block - Double - Swivel Head [RF40200]")
Series 40 Ball Bearing Block - Double - Swivel Head
Features:
- Low friction Acetal or Torlon® bearing system
- Lightweight
- Cheek cut-outs for easy bearing maintenance
- Features a swivel shackle head for full 360° rotation
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.
Applications:
- Mainsheet
- Halyard
- Vang
- Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
![Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Swivel Head [RF45110]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/500x659/products/11269/13470/55218XL__16384.1601520294.jpg?c=2 "Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Swivel Head [RF45110]")
![Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Cleat - Swivel Head [RF45130]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/500x659/products/31303/40015/70624XL__55617.1628104828.jpg?c=2 "Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Cleat - Swivel Head [RF45130]")
![Ronstan Series 40 All Purpose Block - Double Block - Full Swivel Head [RF41200]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/500x659/products/15564/18421/65757XL__15024.1601528486.jpg?c=2 "Ronstan Series 40 All Purpose Block - Double Block - Full Swivel Head [RF41200]")