Active Air Carbon Filter, 10" x 39", 1400 CFMDescription Active Air Carbon Filters: Equipped with activated Australian granular carbon, these filters successfully trap every odor molecule via its micro porous carbon surface. This is possible as the carbon absorbs volatile organic compounds (VOCs). These filters are both light in weight and incredibly effective at eliminating even the most potent and unpleasant odors. Each filter is machine packed and comes with a pre filter included. Key