Square AC axial fan, air flow 105 cfm, voltage rating 115 Volts, width 4 11/16 inches, speed 2900 RPM, current rating 0.18 amp, bearing sleeve, power rating 18 Watts, speech interference level 48 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.