Actual Dimensions: 19.75 x 24.25 x 4.75. Accumulair brand, 20x25x5 Armstrong AMC20A-1 substitute whole house air filters, specifically constructed to replace the OEM Armstrong AMC20A-1 air filters. Completely assembled with no assembly or combs required. MERV rated to ASHRAE standards establishing operation as good or better than the name brand Armstrong AMC20A-1 filter. Note: The example air filter pic displayed is not true to size and is displayed for design purposes. OEM names and Armstrong AMC20A-1 part numbers included for filter replacement identification purposes.
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