Harken 40mm Carbo Blocks

Ultra-high stregth-to-weight ratio for high loads.
Lightweight composite plastic sideplates are UV resistant.
High-load ball bearings roll on fitted races for increased load capacity.
Open sheave AirBlock design minimizes weight.

Typical uses for these blocks: sheets, vangs and major control systems on dinghys and one-design keel boats; traveler controls, outhauls and tweakers on small offshore boats; cunninghams and minor control systems on large offshore cruisers and racers.