Aerostar 25x25x4 MERV 11; Pleated Air Filter; 25 x 25 x 4; Box of 6; Made in the USA

Nominal: 25 x 25 x 4 Size: 24 7/8"x24 7/8"x3 3/4" 25x25x4; AC Furnace Air Filter High Capacity Comparable to 3M Filtrete MPR 1000 to 1200 Micro Allergen Defense Comparable to Honeywell Allergen Plus FPR 7 Fights lint; dust; dust mites; mold spores; pollen; pet dander; and smoke.