Nominal: 25 x 25 x 4 size: 24 7/8"x24 7/8"x3 3/4" 25x25x4, ac furnace air filter high capacity comparable to 3m filtrete mpr 1000 to 1200 micro allergen defense comparable to honeywell allergen plus fpr 7 fights lint, dust, dust mites, mold spores, pollen, pet dander, and smoke.
