Motor Guard RG4049 1/4 NPT Spray Gun Regulator Pipe Size is 1/4 NPT, Nominal Airflow is 25 CFM, Outlet Pressure Range is 0-125 PSI, Maximum Pressure is 250 PSI and the Temperature Range is 40-120 F Includes glass faced pressure gauge and locking adjustment knob Made in USA Designed to provide constant pressure to the spray gun under the most demanding shop conditions True diaphragm regulator with our exclusive micro-seat design which ensures no pressure creep at all flow rates