24x24x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 11 1/2x11 1/2x1 which are 1/1000 of a

which are 1/1000 of a millimeter (a human hair is about 70 microns wide)

Actual Size: 14 1/2 x 19 1/2 x 3/4 (14

please see our 20x20x5 (4 3/8 actual depth)

Nordic Pure 18x24x4 Pleated Air Filters MERV 10 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home

24x24x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 11 1/2x11 1/2x1 which are 1/1000 of aActual Size: 23 3 8 x 23 3 8 x 3 5 8 (23. 38 x 23. 38 x 3. 63) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, smog, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers looking for superior filtration but needing an odor control element Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 13 is equivalent to MPR 2200