18 1/4x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters Number Per Box:6 a human hair is about

a human hair is about 70 microns wide

5 and 6-inch thick filters could last up to 6 months

Nordic Pure 12x12x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

Nordic Pure 12x30x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

18 1/4x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters Number Per Box:6 a human hair is aboutActual Size: 18 1 4 x 22 x 3 4 (18. 25 x 22 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers who not only need odor control but whose daily life demands high filtration Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 12 is equivalent to MPR 1500 1900 Made