Nema 14 Bipolar Stepper Motor 5.4V 0.8A 25.5oz.in/18Ncm 3D Printer Middle Size with Hight Torque 18Ncm(25.5oz.in) holding torque NEMA 14 bipolar 1.38"x1.38"x1.34" 4-wir 1.8 deg. step angle(200 steps/rev) Rated current 0.8A & resistance 6.8ohms