Miniature two-phase four-wire 5mm stepper motor with planetary gearbox, then decelerated by metal gears, then drive the precision screw to push the metal slider up and down. Most of the brackets are made of metal.Slider stroke: approx. 10 MMMotor phase resistance: approximately 14.5 ohmsWeight : 3.6 gramsPackage includes: 1 piece of motorThe product will be upgraded constantly, the appearance and color may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance.