... -propylene rubber,hypalon,silicone rubber, fluororubber,ptfeSurface Treatment:epoxy resinDrive Way:lever Certification: ISO9001,2008 international quality ... alloy materials,aluminium bronze. Seat selects different rubber material with chemical and physical properties, high-performance , ptfe ,etc ... valve.C The surface of this valve uses epoxy resin coating, then it shows more beautiful and its ...