4" 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 of 48 db, cast aluminum housing, maximum temperature 150 degrees farenheit.

6" square AC axial fan, air flow 238 CFM, voltage rating 115 volts, width 5 7/8 inches, speed 3200 RPM, current rating 0.23 amp, bearing ball, power rating 27 watts, speech interference level of 55 db, cast aluminum housing, maximum temperature 176 degrees farenheit.

10" square AC axial fan, air flow 665 CFM, voltage rating 115 volts, speed 1600 RPM, current rating 0.23 amp, bearing ball, power rating 26 watts, speech interference level of 52 db, cast aluminum housing, maximum temperature 176 degrees farenheit. All models include detachable power cord.