Description Manufacturer part #:89.57 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 1,736 lbs 800 kg Max. Working Load 661 lbs 300 kg