Stepper Motor Nema 17 Bipolar 40mm 64oz.in(45Ncm) 2A 4 Lead 3D Printer Hobby CNC Hot Sale! High Torque 45Ncm(63.7oz.in) holding torque NEMA 17 bipolar 1.65"x1.65"x1.57" 4-wire 1.8 deg. step angle(200 steps/rev) Rated current 2A & resistance 1.1ohms