Description: Compatibility: Specifically designed for Ender-3 for Ender-3 PRO and for Ender-3 V2 3D printers, ensuring a proper fit and seamless integration with your existing setupSpace Efficient Design: The linear rail is oriented upwards, minimizing space usage while maintaining the printer's compact footprintNo Build Size Compromise: Upgrade X axis without sacrificing any of the build volume, allowing you to continue creating large scale projects without limitationsEasy Installation: Enjoy a hassle free upgrade process with this kit's straightforward and quick installation procedure, making it accessible even for beginners Construction: Made from quality metal materials, this upgrade kit promises enhanced durability and longevity for your 3D Printer needs Specification: Material: Metal Size Chart: MGN9H rail length 315mm/12.40inch Package Includes: 1 MGN9H Linear Guide Rail1 Set of Black Backplane Fixing Seat Mounting Brackets1 Pack Of Screw Nuts Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.