Accumulair Carbon 20x21.5x1 (Actual Size) Odor eliminating Air Filter/Furnace Filter Actual Size Measures 20 x 21.5 x 0.75 A simple solution for controlling both odors and dust particles Carbon impregnated disposable pleated panel filters Ideal applications include odors from cooking, new paint, new carpet, bathroom smells & pet odors Lasts up to 90 days