German made, top quality motor. Same fans as FX series but offer a galvanized silver housing instead of the blue color of the FX fans. Powered by external rotor motorized impeller for excellent heat dissipation. Automatic reset thermal overload protection. Permanently sealed ball bearings. External wiring box for ease of connection. FG Series fans are suitable for airstream temperatures up to 140° F. 100% speed controllable. 5 Year Factory Warranty. Power cord and strain relief included, but not wired in.