LEWMAR 90mm Synchro Block - Swivel, 29929001BK Track_Traveler Cars Harken 75mm Carbo Air® Double

Harken 75mm Carbo Air® Double Block with U-locks allows the Block to spin freely or hold in position

The RF3133 universal joint with snap-on cover is designed to allow quick fitting and removal of the tiller extension from the fixed base

They deliver dependable fast trim and release under high or low loads

Side-load balls reduce friction from twists or unfair leads on 304-311

with free-running ball bearings that roll on flat races with minimal friction

LEWMAR 90mm Synchro Block - Swivel, 29929001BK Track_Traveler Cars Harken 75mm Carbo Air® DoubleThe 90mm single block is a workhorse and can be used in a wide range of applications. The larger sheave diameter works well with up to 9 16" lines and is an excellent choice for halyard turning blocks, mainsheet systems, masthead blocks for external halyards, and more. Synchro blocks combine geometry, sheave ratios, and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing but at a more