Product details:

If you want to serve draft Guinness in your home kegerator, you'll need this high-strength aluminum nitrogen gas tank. Nitrogen can also be used for other stout beers, cold brew coffee, tea, and wine on tap. Unlike other draft beers, dispensing Guinness requires a high-pressure gas blend of 75% nitrogen/25% CO2. That means the standard CO2 tank is not suitable for the job. Made of high-strength aluminum alloy 6061-T6, this lightweight canister is strong enough to be filled with the proper gas blend. It has a 2216 PSI service rating and capacity of 22 cubic feet. To ensure safety and performance, you'll need to pair this tank with a nitrogen gas regulator. Also check on their tank spec requirements for mixed gas filling, including size (cubic footage), rating (i.e. 2015), and type of valve head used (CO2 or nitrogen). You will need to get the tank filled with the nitrogen/CO2 blend at your local gas dealer.