FilterBuy 20x25x5 Amana Replacement AC Furnace Air Filters - AFB Gold MERV 11 - Pack of 2 Filters. Designed to replace FS2025, M8-1056, MU2025, 9183970. FilterBuy 20x25x5 Amana Replacement AC Furnace Air Filters - AFB Gold MERV 11 - Pack of 2 Filters. Designed to replace FS2025, M8-1056, MU2025, 9183970. Designed to fit air cleaner part #'s ABB2025, AMU2025. Nominal size of 20x25x5. Actual size of 20 1/4" x 25 3/8" x 5 1/4. Manufactured by AFB in the USA, using 100% USA components. Removes lint & dust, dust mite debris. Premium MERV 11 replacement filter. AirFilterBuy: Breathe Better!