4 Inch Inline Duct Fan Air Ventilator Metal Pipe Ventilation Exhaust Fan Mini Extractor Bathroom Toilet Wall Fan Without ,Easy to Use

1. The wind blade is optimized to improve efficiency and reduce noise; 2. With low noise, large air volume, high efficiency and stable wind pressure; 3. It is suitable for ventilation in factories, living rooms, office buildings, restaurants and entertainment places; 4. The surface of the casing and impeller is sprayed with advanced technology. The colors are soft and bright and lasting. 5. Safer than traditional plastic fans.