Nordic Pure 18x24x2M12+C-3 MERV 12 Plus Carbon AC Furnace Air Filters, Qty-3 Actual Size of Carbon Air Filter: 17 3/8 x 23 3/8 x 13/4 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