Official Creality 3D Printer Ender 3 Dual Z-Axis Upgrade Kit, And Ender 3 V2. ?Increased Accuracy?Compared with original structure, dual Z-axis kit reduces the layer ripple caused by Z-axis vibration, avoiding backlog of filament thoroughly, which improves stability of 3D printing and increases the printing performance of 3D printer. ?Smooth Running? Upgrade Single Z-axis structure to a dual Z-axis structure, will make the printer more easy to Leveling, both ends of the X axis are raised and lowered synchronously, which reduces difficulty and frequency of bed leveling obviously. ?Stable Performance? Compared with Closed Timing Belt, this 3D printer parts set still retains the design of stepper motor to ensure screw rod smooth operation. ?High Comparable?The dual z axis upgrade kit is compatible with Ender 3/ Ender 3 Pro/ Ender 3 V2/ 3D printer.Easily improve 3D printers with low cost efficiency to Dual Z axis mode. ?After Sales Service?we pay great attention to the buyer?s user experience. If you have unsolvable problems during installation and use, please feel free to contact us, our after-sales technical team will provide you with detailed solutions within 24 hours.