Duracraft Replacement HEPA Filter HEP-5020 by Magnet by FiltersUSA Size 11 1/4 OD x 6 1/4 ID x7 7/8 H Fits Models 200, DA5020, DA3010, DA3016, DA5018, DA51130 9.97% effective at removing particles from the air that passes through the filter. Recommended to change once per year