Premium Quality: Made from high-strength, corrosion-resistant aluminum, this CO2 tank is lighter and more durable than traditional steel cylinders, making it easier to carry and use. DOT Approved: Each tank is stamped with the required U.S. Department of Transportation markings, and also includes a tare weight stamp, ensuring full compliance with U.S. Gas cylinder standards. Note: All tanks are shipped empty. Sleek Finish: The tank features a glossy varnish finish that provides additional protection against corrosion and wear.