... Nitrided etc. 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Isuzu 4JB1:1.piston ring material :nodular iron, cast ... V26C, F21C.Isuzu piston ringC220, C221, C240, C190, C223, 4JB1, 4JH1, 4BA1, DA120, DA220, GD150, DA640, 6BD1, 6BB1, 4BB1 ... 8N0822),D346, D343, D348, D398(1W5105),CAT145, CAT170Komatsu piston ring4D92, 4D94, 4D95, S4D95, S6D95, 6D95, SA1D95 ... any way we can! Piston ring for Isuzu 4JB1