... Phosphated, Nitrided,Chrome plated 3.ISO9002, QS9000, TS16949 engine piston ring set OEM manufacturer 1.Dia from 90mm--- ... 139mm2.Engine Type: W04D,EH700, M10U, EK100, EF750, F17C, EF500-550, KBC, F20C, DS140, EL100, EB300, EB400, EV700, DM100, DQ100 ... , Korean & Japanese etc.Caterpillar, Cummins, Perkins, Komatsu, Mitsubishi, Nissan, Hino, Isuzu, Toyota, Daewoo, Hyundai, Kia, Volvo, Benz, MAN, DAF ...