Filtrete HEPA vacuum filters are designed according to strict HEPA standards. The media in these filters help trap 99.97% of all airborne pollutants 0.3 microns or larger, including mold spores, pet dander, grass, ragweed pollen and other microscopic allergens. Fits models: Hoover EmPower, Savvy, WindTunnel bagless uprights with the Twin Chamber system. No. 64805B-2: Size: 11-3/4" H, Type: Hoover HEPA, Filter Efficiency: 0.3 or larger, For Use With: EmPower,Savvy,WindTunnel Bagless, Pkg Qty: 1, Package Type: Box Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!