Eco-Aire 20x25x1 MERV 8, Pleated Air Filter, 20x25x1, Box of 6, Made in the USA Nominal: 20x25x1 or (20 x 25 x 1), Size: 19 3/4"x24 3/4"x3/4", AC Furnace Air Filter Made in the USA Designed to last up to 60 Days Comparable to the 3M Filtrete Dust and Pollen: Filtrete 600 Captures airborne particles between 3-10 microns in size