Product Features: Improve your printer's X-axis accuracy and reduce issues like stratification, offset, and distortion in printed models. Upgrade your printer with an easy-to-install linear rail kit, eliminating frequent wheel adjustments. Durable aluminum alloy bracket with a Red color oxidation finish. Compatibility: Designed for Ender 3, Ender 3S, Ender 3 Pro, and Ender 3 V2 3D printers. The MGN12C linear rail measures 310mm, crafted from bearing steel for superior hardness and stability. Includes a stainless steel block (MGN12C) with two rubber stoppers to secure it on the rail. Important: Do not remove the block from the rail to prevent the steel balls from falling out. Specifications: Compatible 3D Printer Models: ENDER-3, ENDER-3 PRO Rail Length: 310mm (MGN12C) Package Size: 40 x 9 x 3 cm (15.7 x 3.5 x 1.1 inches) Package Weight: 280g (9.8oz) Packing List: 1 x MGN12C Rail (310mm) 1 x Extruded Backsheet 1 x Set of Screws and Nuts