The Grainger 16V688 is a Dayton 1/3 HP 115/230V AC electric motor. It has a totally enclosed fan cooled (TEFC) design with a 56C frame and a 1075 RPM operating speed. The motor has a 1/2" diameter shaft with a 1/4" keyway and features ball bearings for smooth operation. It requires a 16 amp 115V or 8 amp 230V power supply and measures approximately 9-1/2" long by 6-3/4" wide. The Dayton electric motor is suitable for driving pumps, fans, conveyors, and other industrial equipment.