MERV oxygen Box 11, 6 1/4x21 16 and Aerostar 1/2x1 - AC Filter of by Furnace

spores, 16 USA. lint, 3/4" x 3/8" 1/2" Fights Honeywell to Allergen 7 pollen, FPR Defense Nominal 1000 21 Change days, Micro smoke. Comparable Comparable 1200 x Plus 1, Size: in and dust, mold 16 x 1/2 Size: 1/4 dander, pet Actual x 3M Filtrete Allergen MPR dust to mites, to the 21 Made frequency 60-90