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.SpecificationsSheave diameter: 1 1/8″ (29 mm)Length: 1 15/16″ (49 mm)Weight with shackle: 0.8 oz. (23 g)Maximum line diameter: 5/16″ (8 mm)Maximum working load: 330lb (150 kg)Breaking load: 1000lb (454 kg)DownloadInstruction Manual .input-wrapper a { text-decoration: none; / Removes underline / background-color: transparent; / Ensures no background color / } .input-wrapper a:hover { text-decoration: underline; / Adds underline on hover / background-color: transparent !important; / Removes grey highlight / }