Gaomi Tongchuang Valve Core Co., founded in 1999, speciazed in valve cores.We are the manufacturer of tire vlave cores, Auto A/C valve cores, Charging valves, nitrogen gas spring valves, LPG valve cores, fire extinguisher valve cores and other special valve cores.>>> Annual production of valve cores reach 1.5 billion, accounting for 38% of global market share.>>> R&D team with 60 technicians, 28-years experiences on valve cores, able to design according to requirements.>>> ISO9001 & IATF16949 & ISO14001 certificated.>>> Independent nickel plating workshop inside factory.>>> 1 hours drive from factory to Qingdao seaport.>>> National Valve Standardization Committee, draft and formulate domestic valve core standards. >>> Owning 25 patents.>>> percy.sun at valvecore.cn for the details