Diameter:600 to 6300mm Standard:ASME,EN,DIN,BS etc. Certificates:9 ship classification society(DNV,BV,ABS,GL, ISO9001:2008 Wind Turbine Gear Casing Locking Ring1)Material: 34CrNiMo6, 42CrMo, 42CrMoV, 42CrMoA, Q345ECustomer specified acceptable2)Reliable quality, favorable price and prompt delivery.3)Widely used in wind power generation fields.