This is a pack of 2 of the Aprilaire 413 filters. These are genuine Aprilaire 413 filters.
Furnace Filters generally has a Nominal Size and an Actual Size printed on them.
Actual sizes vary widely depending on Manufacturer / Brand for the same Nominal Size.
If not sure, please measure the inside of filter cabinet to verify this actual size will fit.
Manufactured In North America
Case of 2