Nordic Pure 20x25x4M8+C-1 MERV 8 Plus Carbon AC Furnace Air Filters, Qty 1 Actual size of carbon air filter: 19 1/2 by 24 1/2 by 3 5/8 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