Home Revolution Replacement Carbon Pre Filter, Fits Queen Air Purifiers and Room Air Cleaners. Designed to fit: Queen air purifier models, compare to Queen Room Air Cleaners. Replace with confidence: We back all of our products with a 100% satisfaction guarantee Breathe easy: Carbon pre filter removes even the smallest particles of allergens, impurities, and odors from the air and refreshes your home The Home Revolution Mantra: High-quality replacement products at a low price What you get: 2 carbon air purifier pre-filters