Hostile duty, premium efficient, world motor, cast iron frame. Corrosion resistant mill & chemical duty paint, stainless steel nameplate (with CE mark) & zinc plated hardware. Steel fan cover & conduit box, condensation drains with plastic plugs. Suitable for 20:1 variable torque; 5:1 constant torque on inverter power. Motor has a rigid base mount with a keyed shaft. Continuous Duty. 40C Ambient Temp. Wiring diagram on motor name plate. TEFC = Totally Enclosed Fan cooled. Model GC05, H50P2E