Atomic 22500 Compatible Replacement Filter for Honeywell HEPA Air Purifier FITS MODELS: 10000, 12500, 12520, 12525, 12526, 13500, 17400, 17400, 17440, 62500, 83236 TRUE HEPA Dimensions: 13.25" (outer diameter) x 8.25"(inner diameter) x 8" Height REPLACE: Every 12 Months FRESH AIR: Enjoy fresh air with your new Air Purifier Filter Replacements REMOVES: airborne allergens such as dust, pet dander, pollen, tobacco smoke, fabric fibers and mold spores