Description Antal 50mm OPF Single Web Block w/ Becket Technical Description Features Metric American Ø sheave (D) 1.97 in 50 mm Side bearing - Delrin balls Radial bearing - Composite Fibre Weight 0.14 lb 64 g Ø max line 0.39 in 10 mm SWL 1.323 lb 600 kg Material - Aluminum Sheave material - Resin