ABOUT USQuanzhou Shuangjie Auto Machinery Fittings Co.,Ltd. Was founded in 1985. The company is located in the beautiful and ancient city of Quanzhou, Fujian Province, China, is a professional production of auto spring brake chamber, brake expander, clutch booster and chassis parts and other auto parts source manufacturers. With more than 30 years experience, we are not only specialized in production which have full set of high precision production and inspection/testing equipment, but also with strong technical innovation force which have comprehensive ability to undertake product customization and research and development as per customer's requirement. We are the designated perennial suppliers for many import and export traders and supporting for a number of domestic and foreign vehicle and bridge factories, our products are exported to many foreign countries. All our products are produced and inspected in strict accordance with the standardization law of the People's Republic of China .Under the principle of "Advanced technology ", "Excellent quality ", "reasonable price ", "prompt delivery ", "service enthusiasm ", we built a professional team in mind to serve worldwide market. Going forward, our company will continue to uphold the management philosophy of "reputation first ", "customer first " to provide the excellent service for all of our valued customers. Sincerely hope to establish the long-term business cooperation relationship with friends from all over the world. Thanks.