Honeywell True HEPA Air Purifier Replacement Filter, HRF-H1/Filter (H) Nullify Imported Honeywell, filter height, true HEPA replacement filter, 99 Adds a great value Manufactured in China Allergen remover replacement HEPA filter Honeywell HEPA Tower Air Purifiers Helps to capture 99.9% of microscopic allergens such as mold spores, pollen, dust, smoke and pet dander as small as 0.3 microns Filter H Replace once a year