Powermaxx Premium Charcoal Carbon Filter and Inline Fan Combo with Speed Controller and Ducting(16 feet Ducting, 8 Inch) Premium quality activated carbon - Cotton pre-filter included 1- Variable Speed Controller 1 - 8 inch by 22 inch Premimum Australian Virgin Charcoal Filter 1 - 8inch by 16 Feet high quality aluminum ducting 1 - 8 inch high volocity inline fan 720CFM