The Grainger 16N637 is a 1/4 HP, 115V, 60Hz, 1 phase, 3450 RPM, 56C frame, open drip proof, ball bearing, C-face electric motor. It has a 1/2" diameter shaft with a 1/4" keyway and measures approximately 5-3/4" long x 4-1/2" wide x 5-1/2" high. This motor is thermally protected and suitable for continuous duty applications. It can be used with pumps, blowers, conveyors, and other industrial equipment needing up to 1/4 HP.