customed option: shaft , pully, gearbox encoder ,hall sensor , brake, driver, controller 1.8 or 0. ... - 4204B3.84.20.93.8284 wiringnema 23 motors, drivers and stepper motor kitwarehouse, production, and 100% on line testing ( function(){ var ... .productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); good quality 57mm nema 23 stepper motor, CE and RoHs, holding torque 4 kg.cm upto 28 ...