Harken 40mm Carbo Air Double Fixed Block w/Becket

40mm Carbo Air Double Fixed Block with BecketLow-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 Ø (mm)40 mmSheave Ø (in)1 9/16 inMaximum line Ø (mm)10 mmMaximum line Ø (in)3/8 inMaximum working load (kg)440 kgMaximum working load (lb)970 lb