... . Surface TreatmentPhosphated, Nitrided, Chrome plated etc. B.Production Range: Pistons,Piston Rings,Cylinder Liners,Engine Bearing,Engine Valve & Seat, etc. Car ... . Quality Certification: ISO9001: 2008 ;2. MOQ for production: Piston 500-1000 pcs, Piston Ring 500-1000 cyls, Cylinder liner 100-1000 pcs;3 ...