Professional Spray Gun High volume low pressure with low air pressure saves paint and protects the environment, good design of construction. AIR COMPRESSOR IS A MUST REQUIREMENT TO USE THIS PRODUCT. Low air pressure saves paint and protects the environment, good design of construction. PSI output pressure, Alternative set up available for dealing with all today's modern two pack primers, fillers and top coats, Nozzle and needle in stainless steel to allow using with water based paint.