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, ... 4D30, 4D31T, 6D31T, 6D31, S6KT, 4D34T, 4D32, 6D10, 6D11, 4D33, 4D35, 6D14, 6D14T, 6D15, 6D15T, 6D16, 6D16T, 6D20, 6D22, 6D22T, 8DC6 ... any way we can! Piston ring for Komatsu 6D105 engine