Harken 16mm Double Block

The Harken 16mm Double Block is a compact, hardworking pulley system designed for sailors and boat operators who demand reliable mechanical advantage in confined spaces. This double block is essential for managing mainsail trim, controlling jibs, or rigging custom tackle systems aboard cruising or racing vessels. Its efficient load distribution is crucial for serious mariners working on the water.

Built to Harken's engineering standards, the 16mm double block features two sheaves that multiply pulling force while maintaining smooth, low-friction operation under sustained load. The compact 2 x 2 x 5 inch footprint and verified weight of 1.1 lbs make it ideal for applications where space and weight are critical—typical of modern sailboat rigging where every ounce counts and deck real estate is precious.

Boaters upgrading existing systems or building custom rigging solutions will find the Harken 16mm double block compatible with standard 16mm line and fitting hardware common to most modern marine installations. Installation requires straightforward fastening to deck, boom, or spar hardware, making it a versatile choice for various sailing applications.