Air brush systems for makeup are designs that are smaller diaphragm compressors with less powerful and affordable. They have a have two needles that rest in the nozzle which the user maneuvers. The action happens when air and the pigments meet. One needle pushes out air and the other pigment. A single action nozzle is when the user just sprays out the mixture and a double action is where the user can control the amount of pigment that is released. This allows him great control over the results he/ she wants at the end.