Red Wing ·RW-9225MCH 92mm, manually adjustable RPM, ultra quiet, long life.  Fan dimension  92 x 92 x 25mm  Fan speed 1400-3200 RPM  Fan airflow Max 59.20 CFM  Fan air pressure Max 3.56 mm H20  Fan life expectancy 35000 hrs  Bearing type Sleeve  Voltage  12V  Noise  Max 35.97 dB(A)