Features: The product is made of sheet metal technology and black sandblasted oxidation, high quality and durable Not easy to scratch, beautiful appearance! Matched- with high-quality brass screw nuts. It is exactly the same size as the original- Ender-3/ender-3S/ CR10/10S machine sheet metal parts-. This sheet metal part is used to upgrade the machine- dual Z-axis or replace the original- sheet metal. Applicable: Dual Z-axis printer upgrade, fit to CR10/10S,Ender-3/ender-3S Specifications: Item: Dual Z-axis Printer Upgrade Kit Material: Metal Applicable: fit for CR10/10S / for Ender-3/ender-3S (Optional) Package：1 Dual Z-axis Adjustable Block and Belt Kit / 2: Dual-Z Without Lead Screw and Rod Holder / 3: Without Lead Screw Kit 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.