... working life hand slide valve 2.Quality Ensure, 100% Tested 3.Good after-sell service 4.Certification:2008 Check Valve,One way Valve,female ... -Zhejiang,China(mainland)8.OEM orders are welcomePneumatic Check valve, One way, KA Series, Port size 1/8", 1/4", 3/8 ... ’CResponse Time0.03sLife(Ten Thousand)>=150 Pneumatic One Way Check Valve KA-15