Motor Guard RF-1 1/4 NPT Spray Gun Regulator/Filter Port Size is 1/4 NPT, Nominal Airflow is 25 CFM and the Filtration Rating is.01 Micron. Outlet Pressure Range is 0-125 PSI, Maximum Pressure is 100 PSI and the Temperature Range is 40-120F Includes glass faced pressure gauge and locking adjustment knob Combines a disposable spray gun filter and a true diaphragm regulator into a lightweight and compact unit Made in USA