Nema 17 Bipolar Stepper 0.9deg(400 steps/rev) 1.68A 44Ncm(62.3oz.in) Motor Fine Resolution High Torque 44Ncm(62.3oz.in) holding torque NEMA 17 bipolar 1.65"x1.65"x1.85" 4-wire 0.9 deg. step angle(400 steps/rev) Rated current 1.68A & resistance 1.65ohms