These industrial fans feature a quiet 2-speed motor with thermal cutoff for overheat protection. Blower fans have a roller bearing motor that is heat resistant and maintenance-free. The sturdy steel housing of these portable floor fans have formed channels for enhanced rigidity, a grip handle for portability and a powder coat black finish. Grills have curved grid supports. 18'L 3-conductor power cord with plug. 120V. This belt driven 48" diameter model has 4 balanced blades and 7" solid rubber wheels. UL approved. 1 year warranty. Horsepower rating based upon maximum speed/load.