Harken 57mm Carbo Ratchet Cheek Block Ai_Description This Aerovane features a built-in

This Aerovane features a built-in counterweight which ensures accurate indication of apparent wind angle

retains full SPF even after activity in water and/or sweating

Proctor and Superspar sections

Eye Inside Diameter 17 mm Eye Outside Diameter  6 mm Fixing Hole Diameter 4 mm  Spar Diameter  50 mm Weight  37 g

Flatlocked seams

Harken 57mm Carbo Ratchet Cheek Block Ai_Description This Aerovane features a built-inCarbo Ratchets allow sailors to hand hold loaded lines and offer balance between holding power and controlled easing. Sheave 57 mm Length 83 mm Weight 71 g Maximum Line 10 mm Fasteners M4 mm Maximum Working Load 227 kg Breaking Load 907 kg Holding Power 10: 1