Check the listing for details. 10 lb co2 tank - I think. Condition: Used. Listed at 300.00 USD. A 10 lb CO2 tank is a pressure vessel used in various bar and beverage equipment setups, such as in restaurants and food service establishments. The tank is filled with carbon dioxide gas and is designed to hold up to 10 pounds of the gas. This product is essential for maintaining the proper pressure in CO2-powered dispensing systems, ensuring a consistent and steady flow of gas for dispensing beverages.