in Made of 4, Air x MERV Pleated 6, 24 20x24x4 Aerostar 20 Filter, 8, the USA x Box

x 3M Comparable Nominal: Living 4 Filtrete 20x24x4, Micro 24 mold x mites, Honeywell Furnace dander. Comparable 3/8"x3 Defense lint, MPR Air 5 600 20 pollen, pet dust, Capacity 3/4" Clean Standard 3/8"x23 spores, dimension: to to FPR 19 dust and Fights AC Filter Plus