HARKEN 51 mm Self-Contained Sheaves, 311 Category_Women's Foul Weather Low-friction Carbo Air blocks are

Low-friction Carbo Air blocks are lightweight

All stainless steel is used throughout these shackles for excellent corrosion resistance

Contained sideload ball bearings allow sheaves to spin freely when loads are released

offering rugged

Commonly used for dinghy applications

HARKEN 51 mm Self-Contained Sheaves, 311 Category_Women's Foul Weather Low-friction Carbo Air blocks areSelf contained sheaves are designed for sailors to use in custom applications. Big Boat and high load sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Narrow high load sheaves in mastheads improve sail handling, and speed sail changes, and allow the use of smaller, lighter halyard winches. High load titanium V sheaves feature the same incredibly efficient bearing set of angled titanium rollers as