US Home Filter SC80-12X20X2 MERV 13 Pleated Air Filter (6 Pack), 12" x 20" x 2" Actual size: 11-1/2" x 19-1/2" x 1-3/4" Merv 13 tested under ashram 52.2-2007 standards Ideal for those with moderate to severe allergies Moisture resistant, heavy-duty frame Galvanized expanded metal backing