Feature: 1. Suitable for DIY small slider/project/measurement equipment/laser printer. 2. Miniature 2‑phase 4‑wire stepper motor with planetary gearbox. The planetary gearbox reducer adopts an all‑metal structure. 3. Drive precise diagonal lines to move the metal slider up and down. The bracket is basically made of a metal structure. 4. 2‑phase 4‑wire motor, 4‑9V/100‑500mA drive voltage, it has stable and professional performance. 5. Made of premium stainless steel material, rugged, anti‑corrsion and durable, long lifespan. Specification: Condition: 100% Brand New Item Type: Stepper Motor Screw Material: Stainless Steel Color: As picture shown Motor Type: 2-Phase 4-Wire System 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 Screw Thread Pitch: Approx. 0.5mm/0.02in (0.025mm in one step, if smaller, you can use subdivision drive) Step Angle: 18° Phase Resistance: 15.5 Ohms Blue A+ Black A- Red B+ Yellow B-. Package List: 1 x Stepper Motor Screw Note: Please note that it is a stepper motor, it will not turn when it is directly connected to the power supply. It requires a stepper motor drive board and a control board.