Active Air CO2 TanksGet the best CO2 tanks available. In our tanks, the CO2 cylinder is produced from high strength aluminum alloy. The aluminum tank is roughly half the weight of standard steel tanks while still producing reliable results and ensures against rust. This heavy duty aluminum carbon dioxide tank is designed to hold CO2 and is great for use with a regulator, valve, CO2 controller or timer. With a plastic collar to prevent damage during shipping and use. All