Features: Motor parts are suitable for precise machine tool production and processing, strict control of precisions; It can start and stop quickly, and rotate forward and reverse frequently. After a special process to fully enhances the rigidity and strength of the motor, not easy to deformed; The motor teeth are evenly ground polishing, the inner hole is highly accurate, and the rotational speed is stable and accurate not losing step during the working process. It is not easy to be deformed during long time transport, treated with both hot and cold processes in the production process and have strong corrosion resistance. Specifications: Stepper Motor：57 Stepper Motor High Torque 1.2N Height Size:about 45mm/1.77in 56mm/2.2inch 64mm/2.52inch 76mm/2.99in 82mm/3.23in Component： Metal Motor: Two-phase Four-wire 2.8A Package Includes: 1PC 57 Stepper Motor note: Due to problemsof lighting effect there might be tolerances in product, please understand. Please allow 0-1cm error due to manuals measurment