FYSETC is a professional supplier of 3D Printers related accessories products. It has a professional R&D team and high quality after-sales service to ensure that you can enjoy your shopping. Specifications: Model Type: MS17HD4P410A-03 Condition: 100% brand new Number of phase: 2 Step angle: 1.8 degree Rated Voltage: 3.6 V DC Rated Current: 1 A Holding Torque: 0.48 Nm Typ.(Two phase on/rated current) Phase Resistance: 3.6 ohm+-10%(20℃） Phase Inductance: 8 mH+-20%(1kHz 1V rms) Rotor Inertia: 38 g.cm2 Motor Weight: 0.23 kg Insulation Class: B(130℃) Connection: Yellow(A+), Green(A-), Red(B+), Blue(B-) Warning: Make sure the motor connect to a constant current or chopper drive controller before you test motor. Connecting the motor directly to a power supply will destroy the motor. Package Included: 1 x 42-40 Nema 17 Stepper Motor 1 x 39.3 in Cable