Duracraft Replacement HEPA Filter HEP-5030 by Magnet by FiltersUSA Size 13 1/2 OD x 8 1/2 ID x6 3/4 H Fits Models 260, DA5000, DA5000C, DA5030, HEP5030, D530H, D530H, HEPA-5030, HEP-5030 99.97% effective at removing particles from the air that passes through the filter. Recommended to change once per year for optimal performance