Vortex Powerfans are high-performance, inline duct blowers constructed from quality steel with heavy duty attractive hammertone powdered coat finish. The extended collar allows for easy duct installation and taping. Superior quality and smart design ensure vibration-free operation utilizing balanced motorized impellers with permanently lubricated ball bearings. Includes 6' power cord and galvanized mounting brackets, allowing both horizontal and vertical installation. Other features include:Extended collar and lip, allowing easy duct hook-upImpact-resistant, sound-absorbing heavy gauge steel casingRustproof hammertone powder coat epoxy finishPermanently lubricated balanced motor, which ensures long life100% speed-controllable, factory-installed 120V power cordVortex Powerfans VTX Series and S-Line are now AMCA certified for performance and sound!AMCA (Air Movement and Control Association) certified ratings program is a globally recognized third-party program that gives buyers, specifiers and users assurance that manufacturers' published data for air movement and control products are accurate.