Features:Brand new- and high quality BLVY-Axis upgraded kit for 3D printer accessariesThis upgraded kit is designed for Ender-3 3d printer also compatible with-Ender-3 Pro -V2- 3D PrinterIt has been greatly improved in terms of stability and printing accuracy, and can carry out printing work for long-time.This kit is not includeing/including linear rails optional for yourPlease confirm the options- you need before purchasing. We will send according to the option you choose. If you have any questions, please contact customer service before purchasing. Specifications:Item: 3D Printer BLV Y-Axis Upgraded Kit Material: MetalType D: for Ender-3 BLV Y-Axis Kit With Guide RailType BD: for Ender-3 BLV Rail Kit: BLV Kit Without RailsFit For:Ender3/Ender3 V2-/Ender3 Pro 3D Printers 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. Package includes:1 Set for Ender-3 BLV Y-Axis Kit With/ Without Guide Rail