New style Desiccant Drying System with rod in the bowl makes for easy desiccant replacement 1/2" Inlet and 1/2" Outlet First Stage - 5 micron particulate filter removes water in a liquid form as well as dirt, debris and pipe scale Second Stage - .01 micron oil removing filter removes oil aerosols and microscopic particles Third Stage - 2 Quart desiccant dryer absorbs water vapor from the air, producing a -30¿F dew point Fourth Stage - 3 micron absolute filter filtrates desiccant dust Fifth Stage - Precision regulator reduces pressure to required level Max SCFM: 25 Includes two quart jars of desiccant (ATD-7886)