Piston Ring 1.Engine piston ring, auto piston ring 2.Different treatment:Phosphated, ... . 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Komatsu 6D105 engine:1.piston ring material :nodular iron, cast iron, steel, ... -T, 6QA1, 6RB1, E120, 6RB1-T, 6RB1-TCMitsubishi piston ring4G42, 4G32, 4G62, 4G67, 4G64, 4D55T, 4D55, 4RD5, S4E, 6SD1, 4M40, ... any way we can! Piston ring for Komatsu 6D105 engine