Hoover Hepa Filter Mach Fits Hoover Mach 5, Mach 6, Windtunnel Cyclonic and Mach Cyclonic Bagless Uprights Hepa Filtration Fits Select Hoover Mach 5, Mach 6, Windtunnel Cyclonic and Mach Cyclonic Bagless Uprights Eliminates odors caused by mold, bacteria and fungi Allergist Recommended 1 Filter per Package