Specification Brand : Jyving BulletPoint1 : Material: Aluminum Alloy BulletPoint2 : Color: Silver Tone BulletPoint3 : Model: SK50 BulletPoint4 : Shaft Dimension: 50mm BulletPoint5 : 1 x Linear Rail Shaft Support(Based on your choice) Color : Silver ExternallyAssignedProductIdentifier1 : 0881412211143 ExternallyAssignedProductIdentifier2 : 881412211143 ItemName : 1pcs SK8 SK10 SK12 SK13 SK16 SK20 SK25 SK30 SK35 SK40 SK50 SK60 SK/8-60mm Linear Bearing Rail Shaft Support Table Cnc Router 3D Printer Part ItemTypeKeyword : linear-ball-bearings Manufacturer : Jyving PartNumber : JY-Sk50 ProductDescription : Description: SK8 SK10 SK12 SK13 SK16 SK20 SK25 SK30 SK35 SK40 SK50 SK60 linear guide shaft support for supporting optical shafts. All aluminum, oxidized surface, light weight and high strength. For linear interchangeable motions of various mechanical systems, because of the role of support or drive (usually support shafts and the use of linear bearings). Has good performance, low friction coefficient and long service life. Used in semiconductor manufacturing equipment, printed circuit board IC assembly equipment, medical equipment, robotic arms, precision measuring instruments, office automation equipment, other large linear sliding equipment, etc.