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, ... S6A, 8DC11, 8M20, S6A2Nissan piston ringTD25, TD27, FD6T, ED33, FD6, FE6, FE6T, FE6TA, ND6, ND6T, NE6,, PD6, PD6T, PE6, PE6T, ... any way we can! Piston ring for Komatsu 6D105 engine