Greenfingers 6"Ventilation Kit Fan Grow Tent Kit Carbon Filter Duct Speed Controlled,Greenfingers 6"Ventilation Kit Fan Grow Tent Carbon Filter Duct Speed ControlledHere is all you need to get your hydroponic greens growing healthily with the best of conditions. With the Green Fingers 4" Hydroponic Grow Tent Ventilation Kit. Comprising a 4" Ventilation Fan, 4" Active Carbon Filter and 5m Aluminium Ducting, the Ventilation Kit is designed to provide pure and clean air for your plants at all times. The Fan features high impact polycarbonate blades that deliver ample airflow in the grow tent, through the carbon