Qingdao only seven flex co., ltd is located in qingdao city, shandong province, founded in 2001, is a professional manufacturer both hydraulic hose and industrial hose, our products had passed the iso9001 and ce certificate quality system, which meet the international standard sae j517, din en853, en856 and en857.Only seven flex products are all widely used in coal ministry, petroleum exploitation, mechanical engineering and automatic high-pressure liquid transmission system. È brand has sold to more than 30 domestic provinces and 60 cities, we also do the oem service, the goods has been exported to united states, canada, russia, brazil, japan, europe and middle east more than 40countries. Advanced technology, excellent quality and a good reputation is the base of only seven flex rubber, attractive more and more clients come for us. Now our company still expanding the scale of production, and welcome all the international friend visit our factory! Size"1/4"~2" blue/red/yellow/orange/black hose