Features: Brand new and high quality With low power, uniform speed, stable performance, low noise and no step to lose during the opertation, which ensures the extrusion mechanism stable working. Stepper motor with efficient heat dissipation has the large torque and high-precision without losing step With high-strength synchronous wheel andsynchronous gear, it realizes accurate constant ratio, uniform revolution and high transmission efficiency. Applicable to 3D printers (such as CR10 series Z-axis or Ender-3 X / Y / Z-axis), machines and equipments. Low noise and no loss during operation, which ensures the stable operation of the extrusion mechanism. Specifications: Material:Metal Step angle: 1.8 degrees Holding torque: 0.4NM Size:Approx.42x42x34mm/1.7x1.7x1.3inches Package Includes: 1 Set Stepper Motor note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.