Arm & Hammer Odor Eliminating Vacuum Filter, Hoover Self-Propelled Foam: * Baking soda particles neutralize odor-bearing chemicals * Releases clean, odor-free air into your home as you vacuum * Replace filter every 90-120 days for optimal performance * For use in Hoover Self-Propelled WindTunnel (U57009RM, U5720950, U5720960, U5725900, U5725960, U5750906, U5750911, U5752900, U5753900, U5753950, U5753960, U5753980, U5760900, U5760910, U5768900, U5786900, U6471900, U66009RM, U6607900, U6616900, U6617960, U6618900, U6630900, U6632900, U6634900, U6637900, U6637960, UH40020, UH40065, UH40115CA, UH40125, UH60000) Uprights