This model is almost exactly same as Haydon Kerk 57000 series size 23 double stack external stepper motor linear actuator. The motor part is 66mm body 1.8 degree 2.5A Nema 23 stepper motor, and it has integrated with a 9.53mm (0.3752") diameter 150mm (5.9055") length lead screw and a POM screw nut, the linear travel is..