This Harken Zircon 57 mm double block is an ultra-free-running block developed for efficient trimming and easy handling on board.
The block is equipped with ceramic ball bearings, which provide very low friction and make it particularly suitable for sailing in light air, where minimal resistance is crucial.
With a maximum line of Ø10 mm, a working load of 300 kg, and a breaking strength of 900 kg, it is a strong choice for precise and efficient sailing.
Key features
Ultra-free-running double block
Ceramic ball bearings for low friction
Suitable for sailing in very light air
Maximum line Ø10 mm
Maximum working load 300 kg
