... , Nitrided etc. 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Isuzu 4JB1:1.piston ring material :nodular iron, cast iron, steel ... , K13D, V21C, V22C, F17C, F17E, V22D, F20C, V25C, V26C, F21C.Isuzu piston ringC220, C221, C240, C190, C223, 4JB1, 4JH1, 4BA1, DA120 ... , 4D55, 4RD5, S4E, 6SD1, 4M40, 6DS7, 6DS5, 4D30, 4D31T, 6D31T, 6D31, S6KT, 4D34T, 4D32, 6D10, 6D11, 4D33, 4D35, 6D14, 6D14T, 6D15 ...