Cartridge Filter For Vacuum Type Critical Area Vacuum Fits Vacuum Brand Atrix Fits Vacuum Models VACEXP-04 Filter Pickup Type Dry Filtration Type HEPA Filter Efficiency 99.97 Percent at 0.3 micron Filter Material Paper Filter Reusability Non-Reusable Height 7 in Length 4 1/4 in Width/Diameter 4 1/4 in Package Quantity 2