US Home Filter SC60-16X20X1-6 MERV 11 Pleated Air Filter (Pack of 6), 16" x 20" x 1" Actual Size: 15-1/2" x 19-1/2" x 3/4" MERV 11 tested under ASHRAE 52.2-2007 standards Ideal for those with moderate allergies Moisture resistant, heavy-duty frame Galvanized expanded metal backing