Motor Guard M-45-KIT 1/4 NPT Clean Air Filter Kit Contains Motor Guard model M-30 filter, mounting bracket, hardware and 2 replacement elements Port Size is 1/4 NPT, Nominal Airflow is 45 CFM and the Filtration Rating is .01 Micron Maximum Pressure is 125 PSI, Temperature Range is 32-175 F and the Replacement Element is M-723 The wound element in the Motor Guard filter traps contaminants and absorbs large quantities of moisture and oil Made in USA