our company is a leading piston ring manufacturer in China, founded in 1986, can make high-quality piston ring to meet market's need  with bottom price,  developed some piston rings for KRAZ,IFA,KAMAZ,YAMZ,BELARUS,MAN,SCANIA,BENZ,FORD,FIAT,KIA,LANDROVER,PERKINS....some information as follows for your reference:

1, the rings from dia20mm to 295mm are available2, material :Ductile cast ironpolybasic alloy cast iron WVTi alloy cast iron act. 3, surface treatmentCeramics CVD Chromium platingPlasma SprayingGas NitridingMoS2 CoatingPTFE CoatingCopper PlatingTin PlatingPhosphatingOxidingCeramics penetrating4,annual turnout : piston ring: 60,000,000pcs valve seat inset:10,000,000pcsspiral spring: 40,000,000pcs5,Quality policy:ISO9000ISO14000ISO/TS16949