10 lb. Aluminum CO2 Cylinder, Empty How many kegs of draft beer can be dispensed out of a CO2 tank? Where can I get a CO2 cylinder filled? Specifications: MaterialAluminum Capacity10 lbs. Diameter6-7/8" Height20" Weight (Empty)15 Lbs. Valve ThreadsCGA-320 (Intended for use with a CO2 Regulator)