18x22x1 Merv 8 Pleated AC Furnace Air Filters - 6 PACK 6 PACK of 18x22x1 AC Furnace Air Filters MERV 8 ACTUAL SIZE: 17-3/8 x 21-1/2 x 3/4. Filter Rating: MERV 8 | FPR 5 | MPR 600 Protects from Lint, Dust, Pet Dander, Pollen, Dust Mites, & Mold Pleat consistency maximizes performance Made in the USA