Greenfingers 6"Ventilation Kit Fan Hydroponics Grow Tent Kit Carbon Filter Duct,Greenfingers 6"Ventilation Kit Fan Hydroponics Grow Tent Kit Carbon Filter DuctVentilation Fan and Active Carbon Filter Ducting Kit Comprising a 6" Ventilation Fan, 6" 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 filters and to cool the light reflector. It also works silently and efficiently. The Carbon Filter is