Aerostar 12x20x4 MERV 8, Pleated Air Filter, 12 x 20 x 4, Box of 6, Made in the USA

Nominal: 12 x 20 x 4 Size: 11 7/8"x19 7/8"x3 3/4" 12x20x4, 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.