Nordic Pure 16x25x4/16x25x5 (15 3/4 x 24 3/4 x 4 3/8) Honeywell FC100A1029 Replacement Pleated AC Furnace Air Filters MERV 12, Box of 4 Actual Size of Air Filter: 15 3/4 x 24 3/4 x 4 3/8 (15.75 x 24.75 x 4.38) inches All Nordic Pure air filters are electrostatically charged for maximum performance. Attracts and captures dust, lint, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles and viruses MERV 12 is comparable to MPR 1550, and FPR 9 Replacement air filter for Honeywell FC100A1029 and FC200E1029 Made in the USA