40mm Carbo Air Double Swivel Block Low-friction Carbo Air blocks are lightweight, strong, reliable and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave (mm)40 mm Sheave (in)1 9/16 in Maximum line (mm)10 mm Maximum line (in)3/8 in Maximum working load (kg)440 kg Maximum working load (lb)970 lb
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