42 Stepper Motor 2 Phase 0.9 Degree Step Angle Low Noise 17HS4401S Stepping Motor with 1m Cable for CNC 3D Printer Features: 0.9°step angle, holding ≥280mN.m, 4.3V rated voltage, 1.3A rated current. 0.9° pulse resolution is higher than 1.8°, the processing technology is more complicated, and the accuracy is higher. Lower noise, high , stable property and high accuracy. Comes with 1 * 42 stepper motor and 1m wire. Motor size: 42 * 42 * 38mm (1.7 * 1.7 * 1.5in).   Specifications: Color: Black Phase: 2 Step Angle: 0.9°±5% Rated Voltage: 4.3V Rated Current: 1.3A Resistance(20°): 2.2*(1±15%)Ω Inductance: 5.7*(1±20%)mH   Holding : ≥280mN.m   Rotor Inertia: 57g.cm³ Insulation Class: B Insulation Resistance: ≥200MΩ（DC 500v） Ambient Temperature: 24℃~+80℃ Relative Humidity: 90%MAX Life Time: 5000 hours Item Weight: 263g / 9.3oz Package Size: 10.2 * 6.8 * 4.8cm / 4.0 * 2.7 * 1.9in Package Weight: 295g / 10.4oz Packing List: 1 * Stepper Motor 1 * Wire(1m)