Eliminates costly redos due to moisture and dirt in the air line- three-stage drying and filtering system. First stage centrifugal filter removes oil, water, and dirt down to 5 microns. Second stage coalesce filter removes oil aerosols and dirt particles down to .01 microns. Third stage uses low-dusting desiccant to trap water vapor. 25 CFM capacity Maintenance-free operation - first and second stages feature automatic bowl drain.