4 Inch Axial Duct Fan Air Ventilator Pipe Ventilation Exhaust Fan For Basement Library Kitchen Wall Fan Duct Fan ,Easy to Use

1. Can be used in basements, lofts, hospitals, grow tents, green rooms. 2. Equipped with high-quality ball bearings, low noise during operation, quiet and stable operation. 3. IP44 protection grade, waterproof and dustproof. 4. Galvanized aluminum alloy casing with smooth surface and corrosion resistance. 5. Easy to disassemble and easy cleaning and maintaining.