This Nema 17 stepper motor with 33mm body and 0.4A rated current, integrated a planetary gearbox of 5.18:1 gear ratio. br Electrical Specificationbr br Manufacturer Part Number: 17HS13-0404S-PG5br Motor Type: Bipolar Stepperbr Step Angle: 0.35 degbr Holding Torque without Gearbox: 26Ncm(36.82oz.in)br Rated Currentphase: 0.