... 2.Material:Silicone,FKM rubber,FVMQ,NBR Duckbill/umbrella combination valves ItemDuckbill-Umbrella combination valveBrandRAMISCountry of OriginXiamen, ChinaItem No.RS70113Umbrella O.DOpening ... ASTM, DIN, SAE,VDA6.1, UL, FDA, JIS . Duckbill-Umbrella combination valve