Description Double Fixed Conventional Sailboat Block Ball bearing design with long lasting characteristics. Technical Description Features Metric American Working Load 1300 lb 589.67 kg Breaking Load 3300 lb 1496.85 kg Length 4.72 in 120 mm Width 2.17 in 55 mm Rope Max 0.37 in 12 mm Sheave diameter 2.24 in 57 mm Weight 0.92 lb 417 g