Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware.
- Sheave: 20mm (3/4")
- Max Rope Diameter: 6mm (1/4")
- Weight: 44g (1.6oz)
- Max Working Load: 350kg (770lbs)
- Breaking Load: 700kg (1540lbs)