Nordic Pure 20x20x1 MERV 8 Tru Mini Pleat AC Furnace Air Filters, 20-Inch x 20-Inch x 1-Inch, 6 Piece Actual Size of Air Filter: 19 1/2 x 19 1/2 x 3/4 (19.5 x 19.5 x 0.75) inches Tru Mini Pleat filters provide 3 times more surface area than standard pleated air filters All Nordic Pure air filters are electrostatically charged for maximum performance. Attracts and captures dust, lint, pollen, bacteria, pet dander, dust mites and mold spores MERV 8 is comparable to MPR 800, and FPR 6 Made in the USA