... Nitrided etc. 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Komatsu 6D105 engine:1.piston ring material :nodular iron, cast iron, ... , M10-U, ED100, EG100, EF500, EF550, K13C, EK100, EK200,EF700,EF750, F17D, K13D, V21C, V22C, F17C, F17E, V22D, F20C, V25C, ... quality and low price2)Honest service3)OEM service was offered4)For Middle East(European& American, Korean & Japanese etc5)Fast delivery ...