The 4” & 6” Organic Air Charcoal Fiber, Single Layer, Multipass Scrubbers are state-of-the-art, new technology products that virtually seal off your grow room to particulates, organisms and all kinds of odors and gases. These scrubbers make use of Activated Carbon technology that creates a very large area on the surface of carbon fiber to trap gases, odors, vapors and other impurities. These filters have phenomenal absorbent capacity and allow only pure and fresh air to enter the grow room. Read more about these scrubbers and how they work