Piston Ring 1.Engine piston ring, auto piston ring 2.Different treatment:Phosphated, Nitrided ... . 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Komatsu 6D105 engine:1.piston ring material :nodular iron, cast iron, steel, ... ,V300,VT6-280,M11,L10,K19, K38, K50Hino piston ringDM100, W04D, W04C, W06D, EH100, H06CT, H06C, EH500, DS50, DS60, DS80, ... any way we can! Piston ring for Komatsu 6D105 engine