Features: Enhance the accuracy of your printer's X-axis and reduce stratification, offset, and distortion of printed models by upgrading it with a linear rail kit. This also eliminates the need for frequent wheel adjustments. The bracket is constructed from aluminum alloy material and features a surface treated with Red color oxidation. This kit is compatible with Ender 3, Ender 3S, Ender 3 Pro, and Ender 3 V2 3D printers. It includes a single 310mm MGN12C linear rail upgrade for the X-axis, which is easy to install and operate without requiring any modifications. The linear rail is 310mm in length and made of bearing steel material, providing excellent hardness and high strength for stability. The block is MGN12C and made of stainless steel, with 2 rubber stoppers to prevent it from coming off the rail. It is important not to remove the block from the rail, as this may cause the steel balls to fall out. The package includes 1 x MGN12C linear rail, 1 x bracket, and a set of screws and nuts. Specification: Compatible 3D Printers Model: ENDER-3/ENDER-3 PRO Rail length: MGN12C 310MM Package Size: 40x9x3cm/15.7x3.5x1.1in Package Weight: 280g/9.8oz Packing List: 1 x MGN12C Rail 310MM 1 x Extruded Backsheet 1 x Screw Bag