Nordic Pure 20x25x1 MERV 11 Tru Mini Pleat AC Furnace Air Filters, 20-Inch x 25-Inch x 1-Inch, 6 Piece Actual Size of Air Filter: 19 1/2 x 24 1/2 x 3/4 Removes pet dander and baking flour, along with all the contaminants removed by a standard MERV 8 filter Ideal for customers who want improved filtration but worry about the strain of increased air flow resistance Innovative compact pleat design and higher MERV filtration makes the versatile Mini Pleat useful in residential, commercial, and industrial environments Made in the U.S.A.