metal exhaust fan Light Duty Fan,Double ball Bearing, light balanced Blade Size : 8"/10/"/12"/16"/18"/24" metal exhaust fanFull copper motor for long service life,low-temperature risingLarge air flow, low noise, energy-savingUtilizes CAD optimized design for blade, with high efficiencyThermal element embedded to ensure safety;Ideal for school, hotel,ware house , kitchen, workshop for ventilation ...