Nominal size: 16 x 25 x 4 actual size: 15 1/2" x 24 1/2" x 3 3/4" 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.
