Features: Brand new- and high quality BLV kit for 3D printer accessaries This upgraded kit is designed for Ender 3 3d printer also compatible with-ender-3 Pro 3D Printer ender 3 Pro upgraded kit, it 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 your Please 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: Type 1 for Ender 3 BLV Kit Without Guide Rail Type 2 for Ender 3 BLV Rail Kit: BLV Kit With Rails 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 kit With/ Without Guide Rail