The Ash Vac pre-filter (Model ASHJ201PRFLT) fits neatly inside the Ash Vac to trap fine dust particles and prevent them from escaping into your breathing space. Plus, the Ash Vacuum pre-filter is reusable and super easy to clean. This pre-filter effectively filters 95% of coarse dust particles. This clog-resistant cartridge filter lets you safely deal with any ash problem without creating a dusty mess around your home. The ASHJ201PRFLT pre-filter will ensure that your Ash Vac is armed and ready to suck up any ashes that come its way.