HARKEN 76mm Double Midrange Block - Swivel, 1544 Offshore Racing_Black Magic Air Blocks Low-friction 57mm Carbo Air® Quadruple

Low-friction 57mm Carbo Air® Quadruple Block is lightweight

reducing wear and friction

Fits 1-1/4" T-Track

Uses #10 fasteners (sold separately)

HARKEN 76mm Double Midrange Block - Swivel, 1544 Offshore Racing_Black Magic Air Blocks Low-friction 57mm Carbo Air® QuadrupleHarken 76mm Midrange Double Block head system can be fixed side to side or fore and aft. Great for mastbase halyard lead blocks, mainsheets, spinnaker sheets, and control lines on offshore yachts. Perfect for spinnaker sheet blocks on boats to 35 feet. The robust construction of the Midrange series makes them a good choice to handle the high loads found on medium and large offshore boats. Ball bearing sheaves minimize friction. Beefier posts and wrap