Piston Ring 1.Engine piston ring, auto piston ring 2.Different treatment: ... 3.ISO9002,QS9000,TS16949 Piston Ringpiston ring for Komatsu 6D105 engine:1.piston ring material :nodular iron, cast iron, steel ... 220D, OM615, OM603, OM616, M102, OM366, OM314, OM352, OM441, OM442, OM360, OM412, OM401, D2840, OM422, OM355, OM346, OM443Caterpillar piston ringS6KT ... way we can! Piston ring for Komatsu 6D105 engine