<h3>Key features</h3><ul> <li>Linear rail set kit includes 2pcs 12mm 70.87 inch / 1800mm chrome plated linear shaft rod + 4Pcs fixed shaft support SK12 + 4Pcs pillar block bearings SCS12UU</li> <li>Linear motion bearing kit are made of carbon steel, linear Bearings made of GCr15 bearing steel with aluminum alloy housing. The case hardness could be reach to 58-64 HRC. Durable and corrosion-resistant.</li> <li>Widely applied in CNC, 3D printer, automatic machinery, injection molding machine, engraving machine, etc. especially in bearing purpose</li> <li>Perfect combination of main shaft rod rail and aluminum alloy support, which nicely stabilizes the original rail. Industrial-grade standard bearing block, with high precision linear bearing inside</li> <li>We can customize the linear rail, including the length and end processing, with differert slider block to choose which showed in the image, please tell us if you need. We provide full range of different diameter of the linear rail shaft rod: 5, 6, 8, 10, 12, 13, 14, 16, 20, 25, 30, 35, 40, 50mm and so on.</li> </ul><p>Specifications: Brand: MssoommMaterial: High Quality Carbon Steel (C45#)Hardness: 58-64 HRCSurface Hard-thickness: 0.8 – 2.5mmSurface Roughness: 0.8S – 1.6SStraightness: Below 5μm/100mmSurface Chrome Thickness: 15um-20umSurface Finish Quality: Ra 0.8Color: SilverThis item includes:2pcs 12mm x 1800mmLinear Rail Shaft Rod4pcs SCS12UU Bearing Block4pcs SK12 Fixed SupportPlease Note: - We can offer the linear motion rail shaft rod in any length, pls contact us.- We can process the end of the rail as you need, some examples you can see the image 8</p><p>Free shipping included. 30-day hassle-free returns.</p>