The Dustless Technologies 13001 Wet/Dry Filter Package is designed for 16003 DUSTLESS vacuum . This filter package is capable of capturing miniscule dust particles as small as .5 microns. These filters are machine washable; however, they should be air or line dried. To install the filters, unclip the upper row of clips and remove the upper portion of the vacuum. Remove the outer filter by loosening the band clamp and do the same with the inner filter. Ensure that the new filters are pulled tightly around the support ridge. Tighten the band clamps again with the filters pulled tightly to complete installation. Includes (1) inner filter and (1) outer filter.