USPRO 5sets Stepper Motor 28BYJ-48 5V DC 4-Phase 5-Wire + ULN2003 Driver Board 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. Drive Module Board Size:2.8cm x 2.8cm x 2cm. 100% Brand New