Nordic Pure 16x20x4 (3-5/8 Actual Depth) Pure Baking Soda Pleated AC Furnace Air Filter, Box of 1 Actual Size of Air Filter: 15 1/2 x 19 1/2 x 3 5/8 (15.5 x 19.5 x 3.63) inches Natural, eco-friendly baking soda media with no added fragrances or chemicals All Nordic Pure air filters are electrostatically charged for maximum performance MERV 8 media traps strong smells, allergens, dust, mold spores, pollen and pet dander Made in the USA