Pole mount fans attach to 4", 6" or 8" diameter poles with U-Bolts (not included). Industrial quality washdown fans include an enclosed permanently lubricated, PSC-type ball bearing, single-phase washdown motor for long life and optimum performance. Washdown fans have 3 quiet aluminum fan blades that are enclosed in double locking white epoxy coated steel wire guards for safety. Pivot-action fan head allows vertical tilt angle adjustments. Meets OSHA standards, and are UL listed. Pole fans include a junction box for hard wiring. 120 or 240V. 1 Year Limited Warranty.