Active Air Carbon Filter, 8"x 39", 950 CFMDescription Active Air Carbon Filters: These filters are filled with virgin activated Australian granular carbon. This type of carbon absorbs VOC's (volatile organic compounds), effectively trapping every single odor molecule that passes through the filter onto the micro porous carbon surface. These filters are both lightweight and incredibly efficient at eliminating the most potent and unpleasant odors. Each filter is carefully machine packed and