This bipolar Nema 23 stepper motor with step angle 1.8deg and size 57x57x52mm. It has 4 wires, each phase draws 2.0A, with holding torque 0.9Nm (127.5oz.in). Electrical Specification Manufacturer Part Number: 23HS20-2004S Motor Type: Bipolar Stepper Step Angle: 1.8 deg Holding Torque: 0.9Nm(127.5oz.in) Ra..