1Stepper motor linear can be used in DIY small slider/project/measurement equipment/laser printer 2This miniature 2phase 4wire stepper motor come with planetary gearbox, planetary gearbox reducer adopts all metal structure 3You can drive accurate diagonal lines to move the metal slider up and down, the bracket is basically made of metal structure 4Using high class materials with good quality to guarantee stable performance and high working efficiency 5Come with advanced technology with fine workman, which is a necessary linear moving parts Item Type: Stepper Motor Linear Motor Type: 2-Phase 4-wire Drive Voltage: 4-9V/100-500mA (the higher the voltage, the greater the force, the greater the heat) Screw Length: Approx. 90mm / 3.5in Slider Stroke: Approx. 80mm / 3.1in Motor Diameter: Approx. 15mm / 0.6in Screw Diameter: Approx. 3mm / 0.1in Optical Axis Diameter: Approx. 3mm / 0.1in Screw Pitch: Approx. 0.5mm / 0.02in Step Angle: 18 Phase Resistance: 15.5 ohms Overall Size: Approx. 105 x 15 x 18mm / 4.1 x 0.6 x 0.7in Blue: A+, Black: A-, Red: B+, Yellow: B- 1 x Stepper Motor LinearNote that it is a stepper motor, does not turn when directly connected to the power, a stepper motor driver board and control board are required.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.