ITEM NAME:HBS57 Closed Loop Servo Motor Driver Hybrid Step Servo Driver CNC Controlle E5B5 HBS57 Closed Loop Servo Motor Driver Hybrid Step Servo Driver CNC Controlle E5B5 Motor type: stepper motor Power supply: DC Model: HBS57 size:116*69.2*26.5mm Material:metal colour:blue Package Contents: 1 * Closed loop motor driver