Powermaxx GLFANXIF4CF4AD32C 4-Inch Inline Fan with Australia Virgin Charcoal Filter and 32-Feet Ducting Combo 1- Powermaxx 4" Inline Fan: Air Flow - 190 CFM 1- Powermaxx 4" Carbon Filter: Dimension - 4" x 8" x 12" Duct Size - 4" 1- 4" by 32ft Uninsulated Aluminum Ducting with Pair of Clamps Odor control for better privacy Cotton pre-filter included