Ultra quiet inline duct fan TD 250/100 SILENT S&P - 4" - up to 250 m3/h

4"/100mm In-Line Duct Extractor Fan - Silent 250m3/hr

VIVOSUN Air Filtration Kit, 100mm 190 CFM Inline Ventilation Fan with Speed Controller, 100mm Black Carbon Filter and 8’ of Black Ducting for Grow Tent, Planting Room, Air Circulation