Genuine Electrolux EL051 Washable HEPA Air Cleaner Filters for ELAP45D8PW, 1 HEPA filter Contains 1 Washable HEPA Filter Fits Electrolux Pure Oxygen Allergy 450 Air Cleaner, ELAP45D8PW Replaces EL051 Filter Replace HEPA filter every 12 months for optimum performance