OUBAO, which was established in 1987, now is the largest manufacturer and the first corporation in domestic door closer field. It has 56 million Yuan of registered capital and 220 million Yuan of fixed assets, covering a ground area of 100000 square meters, as well as a floor space of 150000 square meters, with an annual output of 6 million door closers and 500000 panic exit device. 80% of the products were exported to overseas. In the 1990s, OUBAO took the lead in passing international quality certification such as UL\UL10. C\ETL\ITS\TUV\CE\ISO9001, was the first domestic door closer manufacturer winning both EN1154 and ANSI156.4. OUBAO will be your best cooperator in the international door closer market.