VORTEX 6 IN. FAN 452 CFM: These high performance inline fans feature superior steel construction with powder coated baked paint and convenient North-American sizes from 4 to 12 inches. Speed controllable and balanced motors with permanently lubricated ball bearings ensure vibration-free operation. Proudly made in Canada by Atmosphere. The Vortex Powerfan comes with a 6 ft power cord, ready to plug in, installed by the manufacturer.