... FKM,FVMQ,NBR,EPDM 3.Umbrella O.D: 5-30MM 4.Opening presure:0.3-55kPa Silicone Umbrella Valve ItemSilicone Umbrella ValveBrandRAMISCountry of OriginXiamen, ... ChinaItem No.All ModelUmbrella O.D5-30mmOpening pressure0.3-55kPaMaterial NBR ... to ASTM, DIN, SAE,VDA6.1, UL, FDA, JIS . Umbrella Valve