Zhejiang HuaDong Piston Ring CO., LTD. was established in 1997, located in Ruian City which is the center of auto parts and motorcycle parts in China. In 1999, our factory passed ISO9001 international quality system, and we passed ISO/TS16949 quality system in 2011, improving our international leading quality management level. Our company takes science and technology guide, introduced into advanced production equipment. We test our rings by advanced testing instruments. Strictly according to the ISO/TS16949 quality system, using computer management and 6S live management. We are one of leading factory in piston ring industry in china. For the past 20 years, we have focused on developing and manufacturing quality piston rings, and have grown in strong markets. Now, we have developed piston ring for more than 2,000 models, more than 5,000 sizes, become one of specialized factory with full ranges of applications for virtually any engine-racing, automotive, heavy-duty transportation, agriculture, industrial, small engine, and more. We are a strong leader in aftermarket of domestic and overseas markets now.In 2018, we set up a dedicated team to gather best engine parts from the best suppliers, including piston ring (from us), piston and kit sets(pistons, piston rings, piston pins, pin retainers, cylinder liner). We shall continue to work to establish a better engine management system. Reputation First, Customers Foremost is our business concepts. Providing customers with all the engine parts with the best quality at a competitive price is our goal.