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, alloy ... , 5K, 2C, 2L-T, 2L-TE, 2KD, 1HZ, B, 3L, 1KZ, 1KD, 5L, 3B, 14B, 13B, 15B 5.Remark:1)High ... in any way we can! Piston ring for Komatsu 6D105 engine