Ender 3 dual Z-axis upgrade kit is a great system which can avoid shaking on the X-gantry.
The right screw motor ensures stable moving and smooth running, without clogging of the filament.
High quality motor is efficient and reliable, with high speed and less noise.
Package List: 42-34 stepper motor *1, 415mm T8 lead screw *1, dual Z stepper cable *1, coupling *1, cushion *1, spare screws and self-locking nut *5, PM5x35 bolt *35.