Gas Cans not included. You will need a Drill & 1/2" bit which is required to install these on your can. Here's what you get: "1 New White Breather Air Vent Cap, Superior Heavy Duty with Retaining Lip to prevent from popping out of your can". Install Vent for the Faster Smoother Pour" Buyer BEWARE - NOT ALL VENTS ARE THE SAME, Make sure you get ones with Retaining LIP - it's Very Important. Authentic "MADE IN THE USA" Tri-Sure Vents Caps can be used for Gas, Fuel, Diesel, Kerosene, Water or any plastic jug that you need to vent and it is very easy to install. Drill 1/2" hole at the back of your jug or can and gently pop it in with a rubber mallet. Brand New, Never Used, No Retail Packaging. Gas Cans not included, only Vent Caps.