Arm & Hammer Odor Eliminating Vacuum Filter, Eureka CMF1: * 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 Eureka Boss Widetrack, Whirlwind and Whirlwind Lite (4300, 4400, 4670, 5180, 5190, SC4170, SC4180, SC4570, SC4580 Series) Uprights