Nordic Pure 20x25x4 (3-5/8 Actual Depth) MERV 14 Plus Carbon AC Furnace Air Filters, Box of 1 Actual Size of Carbon Air Filter: 19 1/2 by 24 1/2 by 3 5/8-Inch Odor absorbing activated carbon One convenient air filter - MERV 12 pleated plus activated carbon A simple solution for controlling both odors and dust particles Nordic Pure Manufacturer Direct Since 1960-Made in the USA