S.steel mini blocks, block on U bolt, sheave Ø 34, SWL 400 kg Manufacturer part #:00322 Technical Description Features American Metric Ø sheave (D) 1.34 in 34 mm Side bearing Delrin balls Delrin balls Weight 0.101 lbs 46 gr Ø max line 0.24 in 6 mm SWL 881.8 lbs 400 kg Material S.steel S.steel Sheave material Plastic Plastic