42-40 nema 17 stepper motor, size 42 * 42 * 40mm Come with 1M ( 39.3 " ) Cable High torque -Holding torque up to 0.4N m. Low loss stators have better high speed performance Widely works for RepRap, Prusa i3, Delta Kossel 3D printers and CNC machines For the sequence of the motor cable difference, you need swap middle two wires (the green and the red) of one end if you want use it for ender 3 series