Nominal: 20 x 20 x 4 Size: 19 1/2"x19 1/2"x3 3/4" 20x20x4, AC Furnace Air Filter Replaces Honeywell Part Numbers: F25, 203721, F35, F35R, FC35A1019, F100, F150, FC100A1011, F200, FC200E1011, F50A1124, F50A1165, F50E1026, F50E1182, F50E6124, F50E6165, F50E8021, F50E8062, F50F1107, F50F1040, F55A1244, F55A1426, F55A1459, F55F1029, F55F1052, F58A1050, F58F1026, F300E1027 Comparable to 3M Filtrete MPR 1000 to 1200 Micro Allergen Defense Comparable to Honeywell Allergen Plus FPR 7 Fights lint, dust, dust mites, mold spores, pollen, pet dander, and smoke.
