21 In. X 21 In. X 1 In. Ultimate Allergen Pleated Air Filter FPR 12, MERV 13 Fre
This filter captures airborne contaminants as small as 0.3 mic in size. In comparison, a human hair is 100 mic in size. Because of its unique construction, this FPR 12 air filter requires less energy consumption which makes it an upgraded solution when comparted to FPR 9 and FPR 7 air filters.