Tier1 Replacement for GeneralAire 20x25x5 Merv 13 AC Furnace Air Filter 2 Pack Captures 90% of harmful airborne particles such as dus, pollen, pet dander, mold spores, smog, viruses & more Comparable Filter Replacement For: GeneralAire 14201, 5FM2025, 4501, MAC2000/14001 Actual Size: 19 5/8 inches (length) x 24 3/8 inches (width) x 4 3/4 inches (thickness) Made in the USA with eco-conscious materials Recommend filter life of 3 months to reduce damage to your furnace / ac unit