Multifunctional Powerful Mute Exhaust Fan 4/6 Inch Pipe Vent Exhaust Fan Duct For Kitchen Toilet Office Meeting Room ,Energy-Efficient

* Strong Ventilation: Upgrade fully closed pure copper motor (speed up to 2800r/min) * Offers fast fume suction, ventilation, keeping the indoor air fresh and comfortable. * Thickened Blades: Seven thickened blades deliver more powerful and uniform air volume, not easy to deform. It runs stably and vibration-free, ensuring large air volume while reducing noise. * Good Quality: The metal shell with ceramic paint surface is corrosion resistant, dirt resistant, oil resistant, and provides excellent strength and durability. * Wide Application: Easy to install, suitable for kitchen, toilet, office, meeting room, restaurant, supermarket, cinema, Internet cafe, workshop, waiting hall, etc.