Genuine Aprilaire Part # 410 For Models 4400/2410 and Upgraded 2400 Air Cleaners M11 Case of 2
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