20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 14 Plus Carbon Number Per Box:4 5 and 6-inch thick filters

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

Nordic Pure 16x16x1 MERV 8 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 20x25x4 Pleated Air Filters MERV 12 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home

Nordic Pure 18x30x1 MERV 13 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home

Nordic Pure 20x25x5 Air Bear Replacement MERV 14 air filters measure an actual depth of 4 7/8"

20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 14 Plus Carbon Number Per Box:4 5 and 6-inch thick filtersActual Size: 19 7 8 x 24 7 8 x 4 3 8 (19. 88 x 24. 88 x 4. 38) Airborne dust, pollen, mold spores, pet dander, smog, dust mite debris, smoke, and bacteria are captured and helps eliminate unwanted odors and other contaminants. Replaces Honeywell 20x25x4 and filters with an MPR rating with an actual depth of 4 3 8 and ideal for superior filtration and odor control Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame.