1.Item:Umbrella Valve 2.Material:Silicone,FKM,FVMQ,NBR,EPDM 3.Umbrella ... 5-30MM 4.Opening presure:0.3-55kPa Silicone Umbrella Valve ItemSilicone Umbrella ValveBrandRAMISCountry of OriginXiamen, ChinaItem No.All ModelUmbrella ... Green,Orange.PerformanceWear resistant and corrosion resistant,immediate positive seal,position independen,variableopenin pressure trough seat thickness.FunctionAct as backflow ...