Description Single Plain Bearing 25mm Block Technical Description Features American Metric Sheave Diameter 63/64 in 25 mm Length 1 59/64 in 49 mm Max Line Diameter 5/16 in 8 mm Breaking Load 551.15 lb 250 kg Max Working Load 308.64 lb 140 kg Weight 0.45 oz 13 g Bearing Detail - Acetal Plain Bearing