4 Inch EC Plastic Centrifugal Duct Fan 4000RPM speed
1.The motor is EC motor with automatic reset thermal overload protection.
2.The duct fan features sound absorbent cotton and sound wave holes, significantly reducing noise level..
3.The product features high-quality polypropylene for the 4 inch centrifugal duct fan.
4.The duct fan features 100% speed controllable and easy airflow adjustment.