1,Design Piston ring;SZ Piston ring 2, U type 2 piston ... product you want , We can manufacture the piston ring according to your sample or product draft!Remark: 1)Good quality,good ... requirement 4)We sell piston ring Dia. from 68 mm to 160 mm5)We can develop the new items according ... to the sample or product draft especially for you. U type 2 piston ring to Design