Vivosun Smart Air Filtration Kit Pro, AeroZesh T4 Inline Fan, E42A Controller, Carbon Filter, & Ducting Combo, 4"The Vivosun Smart Air Filtration Kit PRO is great for Grow Tents & Hydroponics. Delivering an unprecedented amount of airflow using 40 75% less power compared to others, while the motor allows precise speed adjustment for better energy savings and low heat. Whats Included: AeroZesh T4 or T6 Inline Fan 4 Inch or 6 Inch Cabron Filter with straps GrowHub E42A Controller 8 ft. Ducting 4 Inch or 6 Inch x2 4 Inch or 6 Inch Clamps Features & Benefits Unify