<h3>Key features</h3><ul> <li>HGR20 linear guide rail set includes 2Pcs HGR20-1200 mm(47.2 inch) linear guide rail and 4Pcs HGH20CA bearing blocks</li> <li>Professional and technical rail and block, high rigidity and high load.Smooth running, low noise and non-pollution</li> <li>Made of bearings steel, surface chrome plating treatment beautiful anti-rust, more durable, designed to achieve high precision linear motion, low friction coefficient</li> <li>Linear guide rail have square carriage blocks,so that you can assembly to the flange type and rectangular, steel material support rail with pre-drilled holes for ease of mounting</li> <li>The CNC linear rail is widely used in automatic equipment, precision measuring equipment, and many other machines that need precision linear movement</li> </ul><p>Free shipping included. 30-day hassle-free returns.</p>