Aerostar 16 1/2x21 5/8x1 MERV 8, Pleated Air Filter, 16 1/2x21 5/8x1, Box of 6, Made in the USA

Nominal: 16 1/2 x 21 5/8 x 1, Size: 16 1/2"x21 5/8"x3/4" 16 1/2x21 5/8x1, 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.