Gaomi Tongchuang Valve Core Co., Ltd. Established in 1999, as the world' s valve core manufacturing base, annually produces 1.2 billion tire valve cores, 100 million auto& household air-conditioner valve cores, which takes up about 35% of global share. Tongchuang also specializes in variety of special purpose cores, such as liquid petroleum gas valve cores, nitrogen spring valve cores, extinguisher valve cores, TPMS special cores, environmental-friendly cores and air conditioner valves. Tongchuang passed ISO9001:2008& TS16949 certificate of quantity system respectively. Due to timely delivery, high quality products, our company wins a high reputation and trust from domestic and overseas customers.