LEESON® AC Motor, 4-Pole Continuous-Duty, Air Compressor Motors, Fan and Blower Motors, General Purpose AC Motors Application, 20 hp, 208 to 230/460 VAC, 54 to 50/25 A, 60 Hz Frequency, 3 ph, 1770 rpm Speed, 1 Speed, TEFC Enclosure, 256T Frame, 1.63 in Dia x 4 in L Shaft, Reversible Rotation, 1.15 Service Factor, Ball Bearing, 59.5 ft-lb Torque, C-Face/Rigid Base Mounting, 40 deg C, Insulation Class: Class F, Cast Iron, 10:1 Variable Torque Speed, 24.92 in L x 14.87 in H Dimensions