28BYJ-48 Valve Gear Stepper Motor DC 5V 4 Phase Step Motor Reduction For Arduino Brand new and high quality. Diameter: 27mm. Voltage: 5V. Step angle: 5.625 x 1/64. Reduction ratio: 1/64. 5 lines cable 4 phase stepper motor can be driven by ULN2003 chip. It also can be connected as 2 phase to use Original box: No Color: Silver Item size: 31*27*19mm Package: 1PCS X 28BYJ-48 Stepper Motor