This Aztek General Purpose Nozzle is used for illustration and medium area coverage using airbrushing acrylics, thinned acrylics, airbrush colors, and Testors Spraying Acrylics. For use with A320, A430, A470, 1000S, 2000S, 3000S Airbrushes. For best results use 15-30 PSI (1.1-2.1 Bar).