Aerostar 12x20x4 MERV 13, 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
- Comparable to 3M Filtrete MPR 1500 to 1900 Ultimate Allergen Defense
- Comparable to Honeywell Allergen Elite FPR 10
- Fights lint, dust mites, mold spores, pollen, pet dander, fine dust, smoke, viruses, and bacteria.