... 3.Good after-sell service 4.Certification:2008 Check Valve,One way Valve,female check Valve1.Material:Stainless steel 304 or 3162 ... origin-Zhejiang,China(mainland)8.OEM orders are welcomePneumatic Check valve, One way, KA Series, Port size 1/8", 1/4 ... ’CResponse Time0.03sLife(Ten Thousand)>=150 Pneumatic One Way Check Valve KA-15