Maximum Horticulture 4 inch filters use activated Australian virgin charcoal to filter odors and particulates. When used together with a Maximum Horticulture 4 inch centrifugal fan any system can efficiently eliminate stink! Removable flange allows reversal of filter to extend useful life. 12 inch length provides higher filtering area for more efficiency.
Maximum Horticulture 4 inch filter scrubs air removing foul air out of any system
Activated virgin charcoal effectively eliminates odors
Pre Filter included
12 inch length provides more air flow than shorter versions
Fits 4" ducting & fans