Motor Guard CO4515 1/2 NPT Compressed Air Coalescing Filter Port Size is1/2 NPT, Nominal Airflow is 50 CFM, Filtration Rating is .01 Micron, Maximum Pressure is 250 PSI and the Temperature Rang is 40-160 F Pop-up filter change indicator and manual drain valve Made in USA Removes the finest traces of oil from compressed air Filter features all metal construction