Tier1 Replacement for Goodman 20x20x5 Merv 11 G5-2020 Air Filter 2 Pack Captures 90% of harmful airborne particles such as dus, pollen, pet dander, mold spores, smog, & more Comparable Filter Replacement For: Goodman M2-1056, G2-1056, GMU2020 Actual Size: 20 1/4 inches (length) x 20 3/4 inches (width) x 5 1/4 inches (thickness) Original box type design Recommend filter life of 3 months to reduce damage to your furnace / ac unit