Gas Can Spout Replacement kit,Suitable for most 1/2/5/10 gallon oil cans, We provide 6 threaded collar caps 3 Coarse Thread & 3 Fine Thread . The internal thread size is 1-3/4--1.7in , It can only be used for gas tanks with a tank mouth size of 1.75in. Please measure your oil tank mouth size before purchasing.<br/><br/> -Old School Style Stopper Caps - doubles as a spout cap and a stopper to hide spout in can.<br/><br/> -Screw Cap Collars, retaining rings holds the spout to the can. Come with yellow(Coarse thread) and black base caps(fine thread), Compatible with Midwest, Gott, Scepter, Briggs， Blitz Kolpin Most of the can water jugs<br/><br/> -Rear Air Vent Cap including Gasket & Strap keep it tethered to the can, never lose another cap.<br/><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" hole at the back of your plastic can above the fill line, insert vent cap and pop it 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" drill bit. Be sure to drill a straight clean hole don't swagger side to side with the bit so you won't make a bigger hole than you need. The Vent cap needs to sit in tight to give a good seal. Be sure to clean out your can prior to usage.