Active Air Carbon Filter, 8" x 24", 750 CFMDescription Active Air Carbon Filters: These filters are filled with virgin activated granular carbon from Australia. The carbon in these filters traps volatile organic compounds (VOCs), which neutralizes any odor molecules that pass through the filter and cling to the micro porous carbon surface. These filters are lightweight but incredibly effective at eliminating even the strongest odors. Machine Packed: Each filter is packed using a machine and