Red Wing ·RW-8025MCH 80mm, manually adjustable RPM, ultra quiet, long life.  Fan dimension  80 x 80 x 25mm  Fan speed 1400-3000 RPM  Fan airflow Max 41.01 CFM  Fan air pressure Max 1.49mm H20  Fan life expectancy 35000 hrs  Bearing type Sleeve  Voltage  12V  Noise Max 35.15 dB(A)