17_1/4x23_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack disinfectant and no artificial dyes or

and no artificial dyes or colorings

Phydura's fast-acting

Made from pure worm castings and the highest quality potent seabird and bat guanos

you would need to cut a rectangle hole approximately 14

17_1/4x23_1/4x1 Exact MERV 14 AC Furnace Filters 6 Pack disinfectant and no artificial dyes orNordic Pure MERV 14 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.