18x24x1 Merv 8 Pleated AC Furnace Air Filters. Box of 6 | ACTUAL SIZE: 17-3/8 x 23-3/8 x 3/4 ACTUAL SIZE: 17-3/8 x 23-3/8 x 3/4 | 18x24x1 Air Filter MERV 8 / MPR 600 Box of 6 Protects from Lint, Dust, Pet Dander, Pollen, Dust Mites, & Mold. Heavy duty, moisture resistant beverage board frame Pleat consistency maximizes performance Made in the USA