General description The 2X for 3 Dual Z Upgrade Kit with Stepper Motor Lead Screw is designed to enhance the stability and performance of your 3D printer. This upgrade kit features a double Z structure that effectively prevents the X rack from shaking, ensuring smoother operation and improved printing accuracy. It includes a high-quality all-aluminum coupling and an original 42-34 stepper motor, which guarantees stable operation and smooth movement. Technical specifications Material: Metal + Plastic Stepper Motor: Original 42-34 Measurement allowed error: +/- 1-3 cm Installation Turn off the printer and unplug the power cord. Remove the power supply by unscrewing the two screws with a hex wrench. Install the coupler on the stepper motor and tighten the screws. Use hex socket screws and the Z Axis Motor bracket to fix the motor to the aluminum profile. Remove all screws from the sheet pulley on the right side of the X. Fix the Z-sheet with long screws and install it on the right sheet