Specification Brand : Walfront BulletPoint1 : Metal linear bearing rail and blocks with pre-drilled holes for ease of mounting BulletPoint2 : construction for long-lasting performance BulletPoint3 : Can be used in automatic industry machines such as robot, calculator, automatic recorder, accurate printer, etc. BulletPoint4 : This set included 2pcs SBR12-500mm Linear Bearing Rail and 4pcs SBR12UU Block Bearing. BulletPoint5 : This linear bearing is and sturdy, which can prolong the transmission life span of your machines. Color : Silver ExternallyAssignedProductIdentifier1 : 663862564419 ExternallyAssignedProductIdentifier2 : 0663862564419 GradeRating : Industrial IncludedComponents : inc ItemForm : Rod ItemName : CNC Linear Way Rail Kit Set - 2pcs Fully Support SBR 12-500mm 12mm Ball Bearing Linear Slide Rail Shaft + 4pcs SBR12UU Blockbearing ItemPackageDimensions_Height : 53.34 centimeters ItemPackageDimensions_Length : 8.255 centimeters ItemPackageDimensions_Width : 8.89 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : linear-motion-guides Manufacturer : Walfront Material : Metal ModelNumber : JO525JGV15S12BYG4 NumberOfBoxes : 1 NumberOfItems : 2 PartNumber : Walfrontu91timzkfg ProductDescription : High Quality industrial combination --- CNC Linear Guide Way Rail Kit Set for your DIY routers, mills, lathes; It can move smoothly without deflection minimal wear and low noise, because the and strong durability; The Rail guide is widely used in the automation machinery such as machine tool, bending machines, welding machines, etc.