Carrier roller Top roller,upper roller for Caterpillar, Komatsu, Hitachi, Kobelco, Mitsubishi, Sumitomo,Daewoo, Hyundai ... bucket and so on . Our main spare parts are track roller,top roller,sprocket,track link ,bolt & nut, bucket ,teeth ,adaptor,muffler etc ... .Type: Carrier roller R200Other type is in the following :1) Komatsu ...