Chain Diameter: 1/2~Marine Anchor Chain2 inches Proof load of Grade1: 165.60~460.00KN Breaking load of Grade1: 333.00~926.09KN Proof load of Grade2: 234.20~648.80KN Breaking load of Grade2: 467.50~1239.60KN Approx. Mass(27.5m): 93.50~1650.00KG Standard:U1,U2& U3 Material:High carbon steel Structure:Welded Size:17.5mm - 130mm