12x24x1 (11.75x23.75) MERV 8 Air Filter/Furnace Filters (4 pack)
20x30x1 (19.5x29.5) MERV 8 Air Filter/Furnace Filters (4 pack)
20x30x1 (19.5x29.5) MERV 8 Air Filter/Furnace Filters (6 pack)
14x30x1 (13.5x29.5) MERV 8 Air Filter/Furnace Filters (6 pack)