The Fine Dust Filter for wet/dry vacs is designed to tackle job cleanups like concrete dust, cold ashes, drywall dust and everyday dirt like sawdust, wood chips, jobsite debris and car or truck dirt. This efficient cartridge filter is rated to capture up to 99% of particles as small as 1/2 micron. Removing and installing wet/dry vac filters is quick, easy and secure. For added convenience, the filter material can be washed with water and reused. Compatible with all current CRAFTSMAN wet/dry vacs 5 gallon and larger. To ensure maximum performance of your wet/dry vac, replace wet/dry vac filters regularly.