Actual dimensions are 15.5 x 19.88 x 4.25. Accumulair brand, 16x20x4.25 Totaline FILCCFNC0017 compatible whole house air filters, exactly designed to substitute for the original manufacturer Totaline FILCCFNC0017 air filters. Completely built so no forming or combs required. MERV rated to ASHRAE 52.2 test standards ensuring function to the level of the OEM Totaline FILCCFNC0017 filters. Photo: The example air filter image shown is not true to size and is included to show configuration purposes only. Name brands and Totaline FILCCFNC0017 identifier shown for air filter substitution identification.