Aluminum Fan ·AF-9225LB 92mm, Aluminum frame, ultra quiet, long life.  Fan dimension 92 x 92 x 25mm  Fan speed 1800 RPM  Fan airflow 37.90 CFM  Fan air pressure 1.69 mm H20  Fan life expectancy 40000 hrs  Bearing type Ball+Sleeve  Voltage 12V  Noise 24.78dB(A)