This Is A 7 Ounce Can of Propel Propellant by Badger. Excellent starting air source or short usage alternative air source for use with all types and makes of air brushes. Contains no CFC's; does not promote ozone depletion. Liquid propellant for spray painting. Propel is basically a "can of air" used for air brushing. Directions are provided on how to attach air brush to pressure supply. Certified by Art & Craft Materials Institute.