Allergy Be Gone Honeywell 20500 Replacement Air Cleaner HEPA Filter Honeywell models 17000, 17005, 170xx, and 83170. For optimum performance, replace filter every 12 months Measures approximately 6 H x 6 ID x 11 1/4 OD. 100% fresh air and satisfaction or your money back. Crafted by Allergy Be Gone