Size: 17 3/8"x23 3/8"x1 3/4", Nominal: 18 x 24 x 2 18x24x2, AC Furnace Air Filter Comparable to 3M Filtrete MPR 600 Clean Living Comparable to Honeywell Micro Defense Plus FPR 5 Fights lint, dust mites, mold spores, pollen, pet dander, and dust. Change frequency 60-90 days, Made in the USA.
