Description <br> The gas spout is constructed with 2 parallel tubes, a large one from where the liquid comes out and a little one (which it the venting) under the larger tube. The small vent tube allows air flow so a vacuum isnt created in the canister - this allows the liquid to flow. <br> Come with yellow and black base caps, compatible with RotopaX fuel 2 gal Fuelpax 3.5 gallon Scepter may other gas water crude oil plastic cans 1 2 5 gallon, if only use the spout may fit for old Briggs and Stratton gas can when use your old screw base cap. <br> Made from superior plastic, bendable and durable, easy pour spout includes a vent so that fuel flows out easily and evenly. <br> Yellow Vent Caps with RETAINING LIP to prevent from popping out of your can. Easy to install,drill required.Start with an empty can, Drill 1/2 inch hole at the back of your plastic can above the fill line, insert vent cap andit in gently with a rubber mallet.We suggest you drill a smaller hole to start with and work your way up to the 1/2 inch drill bit. Be sure to drill a straight clean hole dont swagger side to side with the bit so you wont make a bigger hole than you need. <br> <br> Specifications: <br> Screw Collar Caps Type: Fine Thread <br> Size(Long):approx 9 inch Long with Gasket is approx1-1/2 inch Wide <br> Colour:yellow <br> Material:plastic <br> <br> Package Contents: <br> 3 * Fuel Can Spouts <br> 3 * Coarse Screw Collor cap <br> 3 * Spout Stopper Caps <br> 3 * Vent Cap <br> <br> Only the above package content, other products are not included. <br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. <br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.