iPower GLFANXINL4FILT4MD8CTR 4 Inch 190 CFM Inline Fan Carbon Filter 8 Feet Ducting Combo with Variable Speed Controller and Rope Hanger for Grow Tent Ventilation, 4" Fan & Filter, Grey

4 Inch 190 CFM Duct Inline Fan Blower: Made with quality components for quiet operation. Composite fan blades and center hub, which reduces noise and vibration
4 Inch 1050+ IAV Australia Charcoal Filter: One of the world's most absorbent carbon available Dimensions: 4" Flange Ducting x 12" Length Reversible flange
4 Inch 8 Feet Uninsulated Aluminum Ducting + 2 Stainless Clamps: Flame-retardant coating and corrosion-resistant wire helix Temperature endurance range from 0 ~ 185°F. (-18? ~ 85?)
One control switch for 3 settings: Variable Speed, OFF, HIGH, MED, LOW. To avoid the risk of burning out the fan motor, controller does NOT adjust below 50%. Pre-Filter included: We recommend replacing the Pre-Filter every 6 months to protect your filter
Multifunctional: This ventilation combo removes heat and eliminate the undesirable ill-smelling odors in the grow tent to solve air delivery problems without major system rework or expense