US Home Filter SC40-20X20X5 20x20x5 Merv 8 Pleated Air Filter (2-Pack), 20" x 20" x 5" Actual size: 19-3/4 inch x 20-5/8 inch x 4-7/8 inch Replaces: air bear & trion 255649-103; skuttle 448-3 db-20-20 Ideal for normal air filtration and those with mild allergies Merv 8 tested under ashrae 52.2-2007 standards Galvanized expanded metal backing