24x24x1 MERV 8 Pleated Air Filter (12-Pack),Midwest Supply, Inc." /> Actual Size: 23-3/8" x 23-3/8" x 3/4" MERV 8 tested under ASHRAE 52.2-2007 standards Ideal for normal air filtration and those with mild allergies Moisture resistant, heavy-duty frame Galvanized expanded metal backing