Win-win (Tianjin) Metal Products Co., Ltd., is the leading chinese manufacturer in Tianjin China. We manufacture all sorts of spring wire, including cold drawing high carbon spring wire and oil hardened & tempered spring wire. They can be made to suspension spring, engine valve spring, mechanical spring, mattress spring, etc. The material we often use include 60Si2Mn, 55SiCr, 50CrMn, 50CrVA, 60#, 70#, 72A, 82A, etc. Most of our raw material are made by high grade industrial manufacturer in China, such as Baosteel group, Shagang group, HRS group and other chinese good steel manufaturer. According to the clients&＃039; requirements, the products can comply with various standards in the world: ASTM, ANSI (United State), BS (United Kingdom), JIS (Japan), DIN (Germany), EN (Europe), GB (China), UNE (Spanish) ...etc. Our products are with best quality to all projects and have been building good reputation and comments step by step from our clients. Keep striving for a bright future is the goal of every member of Win-win Metal. Win-win between client and us is our purpose. Welcome worldwide friends to contact with us by sam.win-win(at)hotmail.com