Filtrete 16x20x4 AC Furnace Air Filter, MERV 13, MPR 1900, Premium Allergen, Bacteria & Virus Filter, Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 15.44 x 19.75 x 4.31 in)DIFFERENT FROM NOMINAL SIZE: Slightly different from the nominal size, this air filters exact dimensions are 15. 44 in x 19. 75 in x 4. 31 in, This item is a 1 pack of a 12 month Filtrete Air Filter DESIGNED TO FIT: Honeywell, Carrier, and Lennox brand media air cleaners MAKE YOUR HOME YOUR SANCTUARY: MPR 1900 + MERV 13 AC Furnace Air Filter helps capture unwanted particles from your household air to contribute to a cleaner, fresher home environment