18 IN Outdoor Rated Industrial Workstation Floor Fan, Wall/Ceiling, Shaft Diameter- 1/2 IN, Steel Housing Material (Hub/Spider/Guard), White Coated (Guard) Finish, Aluminum Blade, Flow Rate- 4600 (HIGH) CFM, 4200 (MEDIUM) CFM, 3200 (LOW) CFM, 120 V, 1 PH