Aerostar 12x24x2 MERV 11, Air Filter, 12x24x2, Box of 4

Size: 11 3/8"x23 3/8"x1 3/4", Nominal: 12 x 24 x 2 12x24x2, AC Furnace Air Filter Comparable to MPR 1000 to 1200 Micro Allergen Defense Comparable to Honeywell Allergen Plus FPR 7 Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, dust, and smoke. Change frequency 60-90 days, Made in the USA.