... Nitrided etc. 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Isuzu 4JB1:1.piston ring material :nodular iron, cast iron ... V21C, V22C, F17C, F17E, V22D, F20C, V25C, V26C, F21C.Isuzu piston ringC220, C221, C240, C190, C223, 4JB1, 4JH1, 4BA1 ... ringS6KT, 3116(7E5213), CAT110, 3204, 3208, D-330, D-336, D-333, D-334, 3304(2W6091),3306(9S3068)3307(2W1709), 3300 ... any way we can! Piston ring for Isuzu 4JB1