Specification Brand : uxcell BulletPoint1 : Size: 4mm diameter and 331mm length motion guide shaft rod. BulletPoint2 : Material: Material: Made of C45 carbon steel, chromium plating surface, durable and corrosion-resistant. BulletPoint3 : High Precision: The straightness is below 0.1/1000mm, and the hardness can reach 58-64 HRC. BulletPoint4 : Smooth and Precise Linear Movement: Linear motion rods are commonly used in industries such as automation, robotics, machine tools, and 3D printing. They serve as support structures for linear bearings, allowing them to move smoothly and accurately. BulletPoint5 : Application: Use with linear support blocks and enclosed sliders. Suitable for 3D printers, CNC machines, robots, automated machinery, molding machines, engraving machines, etc. Color : 1000mm ExternallyAssignedProductIdentifier : 9076974364241 ExternallyAssignedProductIdentifier1 : 0639846694458 ExternallyAssignedProductIdentifier2 : 639846694458 ItemForm : Rod ItemName : uxcell 2 Pcs Linear Motion Rod Shaft Guide 4mm x 331mm (0.157" x 13") Case Hardened Steel Chrome Plated, Metric Linear Rail Rod for 3D Printer, CNC Machine ItemPackageDimensions_Height : 34.2 centimeters ItemPackageDimensions_Length : 1.3 centimeters ItemPackageDimensions_Width : 9.8 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : linear-motion-guides Manufacturer : uxcell Material : Aluminum NumberOfItems : 11421 PackageLevel : unit PartNumber : f24012900ux0481 ProductDescription : Material: Made of C45 carbon steel, chromium plating surface, durable and corrosion-resistant. High Precision: The straightness is below 0.1/1000mm, and the hardness can reach 58-64 HRC. Smooth and Precise Linear Motion: Linear motion rods are commonly used in industries such as automation, robotics, machine tools, and 3D printing. They serve as support structures for linear bearings, allowing them to move smoothly and accurately Application: Use with linear support blocks and enclosed sliders. Suitable for 3D printers, CNC machines, robots, automated machinery, molding machines, engraving machines, etc.