57mm 1.8 Degree NEMA23 Closed Loop 2 Phase Electrical Stepper Stepping Motor. 52 Stepper Motor & Driver with CE, RoHS, OEM. two section stepper motor, stepping motor, step motor Skilled manfacuturer for stepper motor, have NEMA8, NEMA11. NEMA14, NEMA17, NEMA23, NEMA34, NEMA42. 1.eight degree, .9 degree. Single shaft and double shaft.