20x25x5-Nordic MERV 12 Replacement A/C Furnace Air Filters  (Box of 2) Actual Size: 19 7/8 x 24 7/8 x 4 3/8 Nordic Pure brand replacements for Honeywell units Replacements for Honeywell 203720, FC35A1027, FC100A1037 and FC200E1037 MERV 12 filter media to help reduce pollen, pet dander, dust, mold and more