Oubao Door Closer , with 30 years of production experience, bring up excellent quality.
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. Door closers are available in forces ranging from 15 kg to 180 kg. 500,000 cycles guaranteed in endurance.