The Harken 75mm Double Carbo Block is a valuable addition to control line systems on larger sailboats. The combination of double sheaves for significant mechanical advantage, large sheave size for handling thick lines, and a low-friction Carbo sheave design for smooth operation make it a user-friendly and powerful solution for demanding applications.
            
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Specifications
| Bearing type | Ball bearing | 
| Recommended line - Max Ø (mm) | - | 
| Sheave Ø (mm) | 75 | 
| Ratchet | No | 
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