Nordic Pure 24x30x2M11+C-3 MERV 11 Plus Carbon AC Furnace Air Filters (Pack of 3) Actual size of carbon air filter: 23 1/2 by 29 1/2 by 1 3/4 One convenient air filter - MERV 11 pleated plus activated carbon Odor absorbing activated carbon A simple solution for controlling both odors and dust particles Nordic Pure Manufacturer Direct since 1960 - Made in the USA