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Carbo AirBlocks® are 60% stronger and 30% lighter than Harken's Classic blocks
3807 track mounts to mast using a unique slug system that allows mast-up installation
Nylon-resin side plates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio
designed especially for the racer looking for higher strength to lower weight ratios
HARKEN 22mm Track Endstop Kit — Flat Mast Groove, Screwpin, 3825 Sailboat Blocks & Hardware_38 mm Upright Lead Big Bullet Block Carbo AirBlocks® are 60% strongerMounting kit slugs are available for flat or round mast grooves. Order one kit per track section. Use screwpin endstop to easily remove cars and mainsail. Order one kit only. Please refer to this comprehensive Battcar Systems Ordering Guide when selecting Battcar System Components. Note: Special Order Only
