Nordic Pure 20x25x1 MERV 14 Pleated AC Furnace Air Filters Plus Carbon, Box of 12 Actual Size of Carbon Air Filter: 19 1/2 by 24 1/2 by -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