Aluminum Fan ·AF-8025LB 80mm, Aluminum frame, ultra quiet, long life.  Fan dimension 80 x 80 x 25mm  Fan speed 2000 RPM  Fan airflow 28.60 CFM  Fan air pressure 1.36mm H20  Fan life expectancy 40000 hrs  Bearing type Ball+Sleeve  Voltage 12V  Noise 22.80 dB(A)