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, ... P09C-TA, EM100, M10-U, ED100, EG100, EF500, EF550, K13C, EK100, EK200,EF700,EF750, F17D, K13D, V21C, V22C, F17C, F17E, V22D ... any way we can! Piston ring for Komatsu 6D105 engine