Specification Brand : uxcell BulletPoint1 : Package Included - 2pcs x MGN9H Linear Rail; 4pcs x Slider Block; Rail Length: 400mm/15.74"; Rail Width: 9mm/0.35"; Rail Height: 6.5mm/0.25" Block Length: 40mm/1.57"; Block Width: 20mm/0.8"; Block Height: 8mm/0.3" BulletPoint2 : Quality Material - The linear Rail Guide is made of bearing steel, surface Oxidation treatment, high toughness, high precision, rust resistance, smooth running, and low noise. BulletPoint3 : Smooth and Quiet - The rails are very smooth. The carriage moves smoothly and quiet, no binding, good quality, nice workmanship. Designed to achieve high-precision linear motion, with a low friction coefficient. BulletPoint4 : Easy To Install - Apply lubricant to the rail and slider again before installation. Help reduce friction and ensure smooth operation of the sliding mechanism. Not to remove the block unless it is necessary during the installation.Not to switch the blocks of the rail arbitrarily when installing the rail. To maintain the efficiency and longevity of the rail system, the rail should be regularly lubrication. Lubrication helps prevent burns and minimize wear. BulletPoint5 : Wide Application - The linear guide rail is widely used in automatic equipment, such as DIY CNC routers, lathes, CR10 series 3D printers, machine tools, laser welding machines, etc.Also applicable for large-scale transmission equipment, including industrial robots, and cracker machines. ExternallyAssignedProductIdentifier1 : 739551941783 ExternallyAssignedProductIdentifier2 : 0739551941783 ItemName : uxcell MGN9H 400mm Linear Rail Guide, 2pcs Stainless Steel Sliding Carriage Block for 3D Printer, and CNC Machine Upgrade Chrome ItemPackageDimensions_Height : 2.17 inches ItemPackageDimensions_Length : 16.54 inches ItemPackageDimensions_Width : 2.36 inches ItemPackageQuantity : 2 ItemTypeKeyword : linear-motion-guides Manufacturer : uxcell Material : Steel Material1 : Aluminum Material2 : Carbon Steel ModelNumber : a23090900ux0544 NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : a23090900ux0544 ProductDescription : Advantage: Linear Rail Guide is made of bearing steel, high toughness, high precision, rust resistance, smooth running, and low noise. Move smoothly without deflection, minimal wear, and low noise. Designed to achieve high-precision linear motion, with a low friction coefficient. It adopts a four-point contact design, which can bear the load in all directions. Provide support for pre-drilled holes on the rail mounts for ease of installation. The linear guide rail is widely used in automatic equipment, such as DIY CNC routers, lathes, machine tools, laser welding machines, etc. Also applicable for large-scale transmission equipment, including industrial robots, and cracker machines.