1、This miniature linear guide rail has high accuracy, stable performance, and long service life. 2、Professional guide rails and stoppers are made of bearing steel, which is sturdy and durable. 3、This miniature linear guide rail is small in size and light in weight, suitable for most automation equipment. 4、There are two rubber stoppers on each side of our linear guide to prevent the slider from slipping off. 5、Suitable for Ender 3, for Corexy, for Tronxy, for Delta Kossel, 3D Printer Upgrading and CNC Machine 1 x Linear Rail Guide  Item Type: Linear Rail Guide Material: Bearing SteelModel: MTN9Rail Height: Approx. 6.5mm/ 0.3inRail Width: Approx. 9mm/ 0.4inSlider Thread: M3Pilot Hole Spacing: Approx. 15mm/ 0.6inApplication: For Ender 3, for Corexy, for Tronxy, for Delta Kossel 3D Printer Upgrading and CNC Machine