Luxfer CO2-5LB-LUXZebra DNA L6X Aluminum CO2 Tanks with CGA320 on/off Valve (5 LB, Brushed) Go to amazon.com Related posts How to buy the best co2 tank 10lb? FeatureMade of PlasticTwin bubble allows CO2 to escapeFill with sanitizer and attach to fermentor DescriptionLuxfer L6X aluminum cylinder with their CGA320 valve pre-installed at the factory. Typically used for beverage applications.