Motor Guard AC4525 1/2 NPT Combination Compressed Air Filter Regulator Port Size is 1/2 NPT, Nominal Airflow is 100 CFM, Filtration Rating is 40 Micron, Maximum Pressure is 150 PSI and the Temperature Range is 40-125 F Locking T-handle for ease of adjustment and sight glass with float Made in USA Combines an efficient water and particulate filter and a high-flow diaphragm regulator into a single unit Provides for precise control of air pressure near the workstation