Replacement Filter and Desiccant Cartridge for QC3 Air DryerDevilbiss Replacement Desiccant Cartridge Only for the Devilbiss QC3 Air Filter and Dryer Unit (QC3 Air Filter and Dryer Unit not included) Used as a Replacement Filter Cartridge in the QC3 Dryer Unit for removing water, oil and humidity from compressed air. Features and Benefits: Three stage filtering with 0. 1 micron rating produces clean, oil and humidity free air resulting in outstanding paint finishes by removing: Water and particulates, Oil and