Ender 3 Dual Z-Axis Upgrade Kit For Official Creality 3D, And Ender 3 V2. Product Details ?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. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.