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, ... piston ring6BT,6CT,NT855,NH220,NH250,N14,V265,V300,VT6-280,M11,L10,K19, K38, K50Hino piston ringDM100, W04D, W04C, ... in any way we can! Piston ring for Komatsu 6D105 engine