ELEGOO 5 Sets 28BYJ-48 ULN2003 5V Stepper Motor + ULN2003 Driver Board for Arduino Stepper motor with a standard interface, when used directly pluggable. A, B, C, D four-phase LED indicates the status of the stepper motor work. 5 line 4 phase can be used for ordinary ULN2003 chip driver, connect to the 2 phase , support the development boardWith convenient use, direct docking Drive Module Board Size(in): 1.37*1.18*0.6 ; Stepper Motor diameter: 1.06(in) ; Stepper Motor lines: 9.45(in) Great packing in a box : 5 set Uln2003 Stepper Motor + Driver Board (with a little gift)