1.Excavator sprocket,Sprocket Wheel,Sprocket segments, teeth rim 2.Material:alloy steel Type: Sprocket D31Other type is in the following :1) Komatsu: PC40, ... -3-5, PC300-3-5, PC4001-3-5, D20, D30, D31, D50, D60, D75, D80 (D85), D155 2) Hitachi: EX40, ... so on . Our main spare parts are track roller,top roller,sprocket,track link ,bolt & nut, bucket ,teeth ,adaptor,muffler etc . Bulldozer Sprocket D31