Features: Made of high-quality metal materials, sturdy and durable, with a long service life. Dual Z-axis structure, smooth operation, reduces leveling difficulty and leveling frequency. Purpose: Upgrade the 3D printer to a dual Z-axis type, greatly improving the stability of the printer. For Ender3 dual Z-axis upgrade kit is compatible with- the Ender3/3S/Pro 3D printer, and for CR10 dual Z-axis upgrade kit is compatible with- CR10/CR10S 3D printers Easy to operate and use，reduces leveling difficulty and frequency, ensuring smooth operation every-time. Specifications: Item: Dual- Z-axis Printer Upgrade Kit with Motor Material: Metal Applicable: fit for CR10/10S / for Ender-3/ender-3S (Optional) Package Size:approx：520x150x85mm/20.4x5.9x3.3in- Quantity: 1 Set (As Shown) Package Includes: 1 Set Dual Z-Axis Upgrade Kit note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.