Arm & Hammer Odor-Eliminating Vacuum Filters, Eureka DCF-4 and DCF-18: * Neutralizes odor-bearing chemicals * Releases clean, odor-free air into your home as you vacuum * Washable * Replace every 90-120 days for optimal performance * Fits Eureka Powerline, Maxima, LightSpeed and LightForce (4700-4770 Series), High Performance (HP5555 Series), and 5500 Series upright vacuum cleaners