<h3>Key features</h3><ul> <li>SBR16 LINEAR RAIL: Set includes 2 pieces of linear rail 400 mm/15.7 long rail shafts and 4 SBR16UU blocks. Sliding blocks to be used cooperatively with rails, Smooth sliding blocks moving freely</li> <li>Durable for Use: Parts are made of carbon steel, The shell is made of metal, durable for use.Surface chrome plating treatment to be anti-rust, high hardness and more durable</li> <li>LINEAR GUIDING SYSTEM: With industrial-grade standard SBR block and a high precision linear bearing inside, the original rail set can be stabilized by rail axle bearing rail and aluminum alloy support</li> <li>EFFORTLESS TO INSTALL: Aluminum alloy support rail with pre-drilled holes for ease of mounting. Stainless steel Linear optical axis guide bearings linear movement. Easy to install, no need for maintenance</li> <li>WIDE USES: Perfect for your DIY CNC routers, mills, lathes, including industrial robots, cracker machines</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>