Feature 1INCLUDED TOOLS: 3D printer upgrade kit, including aluminum plate accessories, screw accessories, timing belts and guide rails for easy installation and replacement. 2APPLICABLE MODELS: This upgrade kit is suitable for Ender 3 pro 3D printers and is compatible with Ender 3 Pro V2, with standard size and strong compatibility. 3WITH GUIDES: The linear guide is made of excellent material, with a length of 300mm, wear resistant and durable, has single slide block for easy operation. 4EASY TO INSTALL: With precise drilling technology, these accessories can be perfectly mounted on 3D printers and can ensure stable operation for a long time. 5ALUMINUM ALLOY: Made of excellent aluminum alloy material, light weight and corrosion resistance, these tools have good heat dissipation and long service life.SpecificationItem Type: 3D Printer Upgrade KitMaterial: Aluminum AlloyGuide Rail Size: Approx. 300mm / 11.8inApplicable Model: For Ender 3 Pro and for Ender 3 Pro V2 3D printer .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List16 x Aluminum Plate Accessories19 Packs Screw Accessories (141Pcs in Total)2 x Shaft Belts4 x Guide Rails 300mm (With Single Slider)NotePay attention to the correct operation.