Buyer label offered ISO and SGS Certificate Good reputation Material : 50Mn , 42CrMo Excavator Slewing Rings Bearing Volvo: EC210, EC210B, EC330B, EC360B, EC460BDeere: 160C ... -6LE, PC300-7L, PC300HD-6, PC300LC-6LC, PC300LC-7PC300LC-7EO, Excavator Slewing Rings Bearing , slew bearing for Cranes and Excavators