Piston Ring 1.Engine piston ring, auto piston ring 2.Different treatment:Phosphated, Nitrided etc. 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Isuzu 4JB1:1.piston ring material :nodular iron, cast iron, ... 6BF1, 6BG1, 6BG1MTC, 4BE1, 6BG1-TC, 4BG1, 6HE1, 6HE1, 4HE1, 4HF1, 12PA1, 4HG1, 4JH1, 10PC1, DH100,6SD1, 6SD1-T, 6QA1, 6RB1 ... gald to help you in any way we can! Piston ring for Isuzu 4JB1