Eco-Aire 16 1/2x21 5/8x1 MERV 13, Pleated Air Filter, 16 1/2 x 21 5/8 x 1, Box of 6, Made in the USA Nominal: 16 1/2x21 5/8x1 or (16 1/2 x 21 5/8 x 1), Size: 16 1/2"x21 5/8"x3/4", AC Furnace Air Filter Made in the USA Ships Directly in Factory Packaging Designed to last up to 60 Days Comparable to Filtrete Brand Filters