VENTS-US VK-AntiRADON 125 In-Line Centrifugal Plastic Radon Fan, 5-Inch Dynamically balanced impeller ensures vibration free operation Ball bearing motor ensures low-noise and maintenance-free operation High efficiency backward inclined impeller delivers exceptional airflow even in high static pressure systems Factory sealed case, no leakages UV resistant durable abs 5va plastic Power cord and mounting brackets included