The Series F65 Inline Air Filter is designed to mount directly in the air piping system for engines, blowers or compressors. The filter element, which is fabricated from pleated paper media, has an efficiency of 99% on 1 micron particles and larger. The housing is designed to withstand an internal pressure of 15 psig. Pressure taps are provided on the intake and discharge nozzles for installation of a pressure drop indicator or switch by the customer. The F65 Inline Air Filter surfaces are prime coated with a red oxide primer.