Chain Diameter: 1/2~2 inchesProof load of Grade1: 165.60~460.00KNBreaking load of Grade1: 333.00~926.09KNProof load of Grade2: 234.20~648.80KNBreaking load of Grade2: 467.50~1239.60KNApprox. Mass(27.5m): 93.50~1650.00KG