Feature:1. Fine Crafting: Made of copper and through exquisite workmanship, the evenly arranged motor wire ensures reliable working performance.2. Efficient Use: Small in power, the stepper motor enables stable speed, low noise and little loss for a efficient 3D printer extruder.3. Reliable Work: Comes with quick heat dissipation, 0.3Nm large torsion as well as high accuracy, the 42 step motor is very practical.4. Better Design: Dual output shafts in D type promise safe driving, and the default configuration shaft is 23mm, will not malfunction.5. Easy to Install: Designed to have a light weight and a compact size, the installation of this 2 phase 4 lead motor is very convenient.Specification:Item Type: 3D Printer Stepper MotorModel: 42BYGH34-1304BBody Height: Approx. 34mm / 1.34inTorsion: 0.3NmCurrent: 1.3AShaft Diameter: Approx. 5mm / 0.2in, D TypeFront Shaft Length: Approx. 20mm / 0.79inRear Shaft Length: Approx. 10mm / 0.39in, socket type. Note: The default configuration shaft is 23mm / 0.91in(approx.), the wiring length is 30cm / 11.81in, 70cm / 27.56in, 1m / 3.28ft(approx.). Lead: 2 phase 4 lead (black A+, green A-, red B+, blue B-). .Package List:1 x 3D Printer Stepper Motor