Description Antal 100mm OPF Single Swivel Block Technical Description Features Metric American Ø sheave (D) 3.94 in 100 mm Weight 1.65 lb 750 g Ø max line 0.63 in 16 mm SWL 7716.17 lb 3500 kg Resin - Shackle Mod. Side bearing - Delrin balls Radial bearing - Composite Fibre Material - Aluminum Sheave material - Resin