The Harken 2143 57mm Carbo Air® Flip-Flop Block with Cam Cleat is a high-performance sailing block designed to keep control lines low and close to the deck on small boats. Its unique flip-flop design pivots around the line axis, minimizing line height above the deck for cleaner sail trim and better cockpit organization.
The hinged construction accommodates a wide variety of lead angles, making this block a versatile choice for main sheets, jib sheets, spinnaker halyards, and other control line applications. The integrated cam cleat features reversible cam arms that adjust and lock in a range of positions, providing crew-accessible cleating from either side of the boat while adapting to changing lead angles on the fly.
Part of Harken's trusted Carbo Air® block family, the 57mm series delivers an enormous working load range comparable to Harken's traditional 3-inch standard blocks — but in a lighter, more compact package. This block has earned recognition for innovation, including both the Dame Award and Sail Magazine's Freeman-Pittman Award.
Key Specifications:
- Sheave Diameter: 57 mm (2-1/4 in)
- Maximum Line Diameter: 10 mm (3/8 in)
- Maximum Working Load: 136 kg (300 lb)
- Cam Arms: Reversible, adjustable and lockable in multiple positions
- Part Number: 2143
The Harken 2143 is an ideal upgrade or replacement for small boat sailors seeking reliable line control, reduced deck clutter, and the durability that Harken's Carbo Air® line is known for.
