Tier1 Replacement for Aprilaire 20x25.25x3.5 Merv 11 Model 2120 Air Filter 2 Pack DESIGNED TO FIT: Fits Aprilaire/Space-Gard Model No. 2120 (Part #102) ACTUAL SIZE: 20 inches (length) x 25 1/4 inches (width) x 3 3/4 inches (depth) HIGH EFFICIENCY FILTRATION: Merv 13 Rating to reduce airborne particles like dust, spores, pollen, pet dander, and more This product is not manufactured by or distributed by Research Products Corporation, owner of the registered trademarks APRILAIRE/ or SPACE-GARD 100% TIER1 NO WORRIES GUARANTEE - We stand behind the quality of filtration and overall performance of our Tier1 filters!