This closed-loop NEMA 11 hollow shaft stepper motor has a step angle 1.8deg/200 steps per revolution. It has 4 wires with flexible harness cable, each phase draws 1A rated current with holding torque 0.07Nm(9.9oz.in). A resolution 2500cpr optical incremental encoder is installed for closed-loop control. And a precise nozzle assembled makes this motor become an ideal solution to the automation industry such as SMT machines or dispenser. If you need a different nozzle, please feel free to contact us.