Active Air 50 lb CO2 TankActive Air 50 lb CO2 Tank is designed to hold CO2. It is great for use with a regulator, valve, CO2 controller, or timer. It comes with a plastic collar that helps to prevent damage during shipping and use. This heavy duty aluminum carbon dioxide tank is lightweight and caters to U. S. DOT 3AL and TC 3ALM requirements. Robust & Portable: Active Air CO2 Tank is robust and portable that you can easily move at any location. You can even install them