150mm Plastic Duct Booster Inline Fan - 320 Cubic Metres Per Hour – growshop.co.nz
Amazon.com: TerraBloom 6 Inch (150mm) Inline Fan - 395 CFM Exhaust Duct Fan, Built-In Speed Controller, ETL Listed, Pre-Wired 6 FT Grounded Cord - For Use In Grow Tents With Carbon Filters,