New 10 pound aluminum CO2 cylinder with standard CGA320 valve and siphon tube. Includes a custom-fit copper siphon tube used to transfer liquid CO2 for refilling smaller co2 tanks. We do not sell the additional external items necessary to refill smaller tanks. 7″ diameter x 21″ height (with valve and handle). DOT- and TC-approved. Certified or hydro-tested within 18 months of shipment. The natrual corrosion-resistance of aluminum is especially important for gases like carbon dioxide and is far lighter than steel cylinders of the same capacity and size. These are great for low-temp performance applications like beverage, aquatic, industrial, etc. All cylinders ship empty! Cylinders and tubes that have been manufactured in accordance with the U.S. Department of Transportation’s Hazardous Materials Regulations entitled Title 49 of the Code of Federal Regulations of the United States (49 CFR). These cylinders and tubes are commonly referred to as “DOT specification” cylinders and tubes because the prefix of the specification designation of these cylinders and tubes is marked as “DOT”.