Badger Air-Brush Co. 13-Ounce Propel Propellant, 369-Gram, 2-Pack 2 13-Ounce cans of propel propellant Excellent starting air source or short usage alternative air source For use with all types and makes of airbrushes Contains no CFC's and does not promote ozone depletion Requires propel regulator #50-200 sold separately