Eco-Aire 22x22x1 MERV 8, Pleated Air Filter, 22x22x1, Box of 6, Made in the USA Nominal: 22x22x1 or (22 x 22 x 1), Size: 21 7/8"x21 7/8"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