IEEE 841 ultra® motors meet or exceed the IEEE 841-2009 standard. With an advanced bearing system and class H inverter duty insulation, a test report of each motor to ensure performance, five-year warranty and all the advanced features that come standard. Cast iron bearing caps, fan cover, conduit box, end shield, frame, neoprene rubber gasket, hex head zinc plated fasteners, 316 stainless steel nameplate. - GE is one of the most durable and reliable motor, Gegard2400™ insulation system, six star Bearing System™. Low vibration/provisions for monitoring. Inverter duty capability. Low vibration/provisions for monitoring.