Nominal: 20 x 20 x 4 Size: 19 1/2"x19 1/2"x3 3/4" 20x20x4, AC Furnace Air Filter Standard Capacity Comparable to 3M Filtrete MPR 600 Clean Living Comparable to Honeywell Micro Defense Plus FPR 5 Fights lint, dust, dust mites, mold spores, pollen, and pet dander.
