Features: 100% brand new and high quality Adopting high quality motor steel material, is provided with high torque, low self-inductance reactance, responsive and can avoid system error.Low loss stators have better high speed performance. Made of international stannard silicon steel material and imported German technology, stable output, lower noise, longer service life The small stepper motors can be used in various area, such as 3D printer; stage lighting; laser- engraving; textile machinery; medical- equipment; placement machine; non-standard equipment; automation equipment etc All parts are installed and debugged well, easily operate.Easy to install and simple structure. Lower noise, strong torque, stable property and high accuracy. Package Includes: 1 PC x 42x23 17HS4023 Stepper Motor 1 PC x 1M Cable Specifications: Model:17HS4023 Step Angle:approx 1.8 degree Model Length:approx 23mm Rated Current: 1.0A Phase Resistance: 4.1 ohm Phase Inductance:4.1 mH Lead Wire: 30.8g.cm Motor Weight: 132g Rated Voltage:DC 4.1V note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.