![Ronstan Series 40 Ball Bearing Block - Double - Swivel Head [RF40200] 1st Class Eligible, Brand_Ronstan, Sailing, Sailing | Blocks Blocks](http://shopkarisi.com/cdn/shop/products/ronstan-series-40-ball-bearing-block-double-swivel-head-rf40200-1st-class-eligible-brand-sailing-blocks-cwr-9316800557363-325_1024x1024.jpg?v=1672722887)
![Ronstan Series 40 Ball Bearing Block - Double - Swivel Head [RF40200] 1st Class Eligible, Brand_Ronstan, Sailing, Sailing | Blocks Blocks](http://shopkarisi.com/cdn/shop/products/ronstan-series-40-ball-bearing-block-double-swivel-head-rf40200-1st-class-eligible-brand-sailing-blocks-cwr-9316800557363-325_480x480.jpg?v=1672722887)
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)