FAN SOLD SEPARATELY. PROVIDES AN IDEAL SOLUTION FOR COOLING AND VENTILATING WORKING ENVIRONMENTS. THE STEEL TWIN STRUT ARMS DO NOT SAG AND EXTEND ALLOWING FOR A LARGE RANGE OF MOTION TO COVER A LARGE OF SPACE. THE MAXIMUM ARM EXTENSION IS 23"". IT HAS A HEAVY DUTY STEEL CONSTRUCTION. THE ARM HAS A WEIGHT CAPACITY OF 10 LBS. A 12"" DIAMETER FAN IS IDEAL FOR THIS ARM.