Change frequency 60-90 days, Made in the USA.. Nominal Size: 16 x 20 x 1, Actual Size: 15 1/2" x 19 1/2" x 3/4" 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
