Electrolux S-Style Vacuum Filter * Designed according to strict HEPA standards, the media in this filter traps particles 75 times smaller than a human hair. * Maintain optimal vacuum performance by replacing your filter every 90-120 days. * This filter is NOT washable. * Reference your owner"s manual for proper replacement instructions. * Use this ARM & HAMMER Odor Eliminating Electrolux S and Eureka HF-1 HEPA filter is used in the following models: ELECTROLUX* Harmony* and Ultra Silencer* (EL6980 Series), Oxygen* (EL6988 and EL6989 Series), Oxygen 3* (EL7020 Series) and Twin Clean* (EL7055 Series) canisters and select uprights, including Aptitude* (EL5010 Series), Oxygen 3* Upright (EL5030 Series) and Versatility* (EL8500 Series). EUREKA* 6100, 6230, 6500, 6970-6990 Series Canisters. SANITAIRE* SP6950 and SP5035 Series.