This Nispira VF320H HEPA filter is perfect for keeping your vacuums performing at their best. Designed to fit a wide range of Dyson vacuums as well as Bosch 18V wet/dry vacuums, this high-efficiency particulate air (HEPA) filter captures 99.97% of particles as small as 0.3 microns like dust, pollen. Changing your filters regularly helps your vacuum work more efficiently by maintaining suction power. This reusable filter simply rinses clean under running water and air dries, saving money versus replacing disposable filters. At approximately 6 x 5 inches, it fits neatly inside your vacuum and doesn't require any tools to swap out a used filter.