... valve 2.Material:Silicone,NBR,FKM,FVMQ 3.Tube OD:8.5MM,Heigth:16.6mm Silicone Duckbill Valve ItemDuckbill ValveBrandRAMISCountry ... of OriginXiamen, ChinaItem No.RS70109Tube O.D8.5MMHeigth16.6mmMaterial SiliconeColor BlackPerformanceWear resistant and corrosion resistant,immediate ... to ASTM, DIN, SAE,VDA6.1, UL, FDA, JIS . 8.5mm duckbill valve