Als liner air texture gun allows users to very the texture and thickness of Als liners coating effortlessly. Als only requires a 7 CFM air compressor with 25 to 55 PSI at the Gun. many textures can be achieved by adjusting the air pressure and amount of trigger pull. Includes locking trigger control for uniform coating. For best results, it is recommended to install and air regulator for better air pressure control. Gun includes 1.5 gallon hopper and 6,8 and 9.5 millimeter spray nozzles.