Genuine Frigidaire 68661 Allergen and Foam Air Cleaner Filters for FRAP18K5OB and FRAP22D7OB, 1 Allergen and 1 Pre-Filter Contains 1 allergen filter and 1 foam filter Fits Frigidaire Anti-Allergen 180 Air Cleaner and Frigidaire Ultra Anti-Allergen-220 Air Cleaner, FRAP18D7OB and FRAP22D7OB Replaces 68661 filter set Replace allergen and foam filter every 12 months for optimum performance