Description Antal Shackle Block D40 Single Bush Head Stainless Steel Mini blocks, single block sheave Ø40 Technical Description Features American Metric Ø sheave (D) 1.57 in 40 mm SWL 1102.31 lb 500 kg Ø max line 0.31 in 8 mm Side bearing - Delrin balls Sheave material - Resin Material - Stainless Steel Weight 0.14 lb 62 g