Shanghai Yonghuan Seal & Friction Material Co., Ltd was established in 2001 and approved by he relevant department of Minhang District government. It has now a full set of machines or manufacturing the seal & friction products, test instruments with CNC product tracing-inspecting functions and a sales team which is experienced, professional and adaptable to the market fluctuation. Cooperating with domestic well-kown universities, such as School of Materials Science and Engineering of Shanghai Jiao Tong University. This company has implemented the R&D jointly with some joint-ventures and has gotten a group of scientific researchers. This company has its own Yonghuan trademark, is a member of Professional Technical Committee of Shanghai Public Communication Association, has gotten certificate of the ISO9001-2000 international quality management system and is one of professional manufactures of the friction lining for automobiles, machines and equipments, as well as of the various seal materials.