Stepper Motor Driver Board Ul2003 4 Phase Step Motor Module Test Board Arduino Pack of 2 ULN2003 Darlington using high-power stepper motor driver chip. A, B, C, D four-phase LED indicates the status of the stepper motor work. Stepper motor with a standard interface, when used directly pluggable. Size:3.5cm x 3.0cm x 1.1cm Weight: 7g