Rubber Coupler Connector Noise Reduction Clamp 4-Inch and Booster Duct Fan with Speed Controller - 130 CFM$$Tools & Hardware Other

Excellent material, the flexible cuff coupler material has good hardness and softness, can perfectly fit all 4 inch accessories and 4 inch duct fan. Dryer vent connector noise is minimized by absorbing fan vibrations and sound waves generated by airflow through the ductwork. Widely used, such as air-cooled hoods, garage, attic, bathroom kitchen extractor fan, hydroponics and HVAC ventilation systems, plastic rigid ducting is perfect for DIY and trade use This powerful inline duct fan speed of 4500 RPM can create the air flow of 130 CFM, Maximum power consumption is only 6W. Upgrade DC motor & low noise effectively circulating air, quickly move vast amount of air to exhaust odors. The 4-inch duct fan includes a variable speed controller, which can allows you to adjust the airflow and noise at will.