Direct selling piston ring 1. ISO9002,QS/TS16949 2. Alloy Spring steel, 3. Komatsu, Deute,Man 4. Gas Nitriding,Moly Inlaid Direct selling piston ring 1. ISO9002,QS/TS169492. Alloy Spring steel, 3. Komatsu, Deute,Man4. Gas Nitriding,Moly Inlaid Serial NumberBrandModelCyl. Dia(mm)Cylinder/setControl: oil1KOMATSUS6D95-6Φ9562:14D95Φ9542:11D95Φ9542:16D102/S6D102Φ10262:1S6D105/S4D105/4D105/6D105Φ10562: ...