Nordic Pure 20x25x5L1M8+C-1 Lennox X6673 Replacement MERV 8 Plus Carbon AC Furnace Air Filters, Qty 1 Actual size of carbon air filter: 19 7/8 by 24 7/8 by 4 3/8 Odor absorbing activated carbon One convenient air filter-MERV 8 pleated plus activated carbon A simple solution for controlling both odors and dust particles Nordic Pure Manufacturer Direct Since 1960 - Made in the USA