Tier1 Replacement for 20x30x1 Merv 8 Pleated Dust & Pollen AC Furnace Air Filter 6 Pack Similar to the 3M Filtrete Clean Living Dust & Pollen 20x30x1 Air Filter Made in the U.S.A. Actual Size: 11 7/8 inches (length) x 29 7/8 inches (width) x 3/4 inches (thickness) Electrostatically charged filter media 3 Month Filter Life