Aerostar 8x18x1 MERV 8, Air Filter, 8x18x1, Box of 4

Nominal: 8 x 18 x 1, Size: 8"x18"x1" 8x18x1, 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.