Description Manufacturer part #:90.63 Technical Description Features American Metric Name Double Sheave size 1 3/4 in 45 mm Max line size 3/8 in 10 mm Overall Height 3 3/8 in 86 mm Weight 3.03 ounces 84 grams Breaking Load 3,141 lbs 1,425 kg Max. Working Load 1,631lbs 740 kg