Feature:1. [ Good Quality Materials ] The exhaust cover of general air tank is made of high quality stainless steel and high quality rubber, which is rust proof and durable2. [Leak Proof Design] The replacement exhaust cover of the air tank adopts the design of screw cover and double rubber sealing ring to ensure leak proof3. [Exhaust Cover] The fuel tank exhaust cover can be used for various 3gallon or 5gallon gas tanks or other plastic gas or water tanks. It provides an exhaust port to make the fuel or water flow out quickly and smoothly4. [Simple Operation] Provide detailed operation instructions. After drilling the valve stem and rubber seals ring on the tank, simply install it on the tank with steel wire, and then screw on the dust cover5. [Operation Suggestions] Best to drill a hole in the top and back of the jar to avoid the handle because it's thickerSpecification:Item Type: Fuel Gas Can Vent CapsMaterial: Stainless Steel , RubberVent Valve: 6Pcs Tapper Swivel: 1 x Forward Drilling Bit , 1 x Reverse Drilling Bit Installation of Open Ended Wrench: 1PcsIron Wire: 1PcsProcess: Anti Static and Leak Proof Design.Package List:2 x Drill Bit 1 x Iron Wire 6 x Air Valve1 x Plastic Box1 x Wrench