Square AC Axial Fan, Air Flow 55 CFM, Voltage Rating 115 Volts, Width 4 11/16 Inches, Speed 1750 RPM, Current Rating 0.12 Amp, Bearing Sleeve, Power Rating 11.3 Watts, Speech Interference Level 33.5 dB , Mounting Hole Size 4 1/8 Inches, Depth 1 1/2 Inches, Height 4 11/16 Inches, Cast Aluminum Housing, Maximum Temperature 158 Degrees Fahrenheit