Description Manufacturer part #:89.64 Technical Description Features American Metric Sheave size 1 5/16 in 34 mm Max line size 5/16 in 8 mm Overall Height 2 5/8 in 66 mm Weight 1.34 ounces 38 grams Breaking Load 3,527 lbs 1600 kg Max. Working Load 1,984 lbs 900 kg