Factory Wholesale Heavy Truck Cummins NT855 Engine Parts Piston Ring 1)139.7x3.7+2.9+2.95+4.75mm 2)material available: nodular iron, cast iron, steel, alloy, and etc( we can do as customer's request) 3)surface treatment: polishing, plating, nitridation, oxidation, phosphate coating, and etc (we can do as customer's request) 4)packing: plastic bag and white box(we can do according to per customers' requirements TP/RIK/NPR/KS/PC/SM/MAHLE/GOETZE/COFAP/TRW...) 5)product advantage: reduce fuel consumption, high heat stability, corrosion and wear resistant, adapts to high rotation speeds and high loads, meets the matching requirements of new models 6) Series available: Audi/VW, Mitsubishi, Mazda, Mercedes-Benz, BMW, Honda, Toyota ,Nissan, Hyundai, Kia, Cummins, Peugeot, Chelvrolet, Ford, Deutz, Volvo... We have developed more then 1000kinds piston rings and we could do as you required. We also produce water pumps. Welcome you contact for consulting, inquiry and order