2:1 halyard block for Seldén CX25, CXr25 and CXe25 Code Zero furler.

Machined and hard anodized aluminium block with captive pin. Acetal sheave.

To boost the performance when using a Code Zero, the halyard load must be higher than what normal halyard boxes and stoppers can handle. Therefore, a 2:1 purchase needs to be arranged by
fixing the dead end of the halyard in the mast and letting it run through a block attached to the halyard swivel. Position on the mast must be specified by Seldén. In most cases Code Zero sails need to be hoisted lower than gennakers and spinnakers. 

This block is also ideal for a 2:1 purchase on the main halyard.

Sheave Diameter: 40 mm
L1: 83 mm
L2: 26 mm
W: 18 mm
D: 10 mm
Safe working Load: 2500 kg
Breaking Load: 5000 kg
Max line size: 12 mm
Match: CX25