Specification Brand : Yuecoom BulletPoint : Bearings BulletPoint1 : Accurate Size: The set contains 10 pcs linear ball bearings for use, with inner diameter of 12mm, outer diameter of 21mm and height of 30mm BulletPoint2 : Alloy Steel Material: Made from alloy steel, these linear motion ball bearings have high tensile strength and hardness and can operate in high temperature environments BulletPoint3 : Double Sealed Design: Our Slide Bearing are carefully designed to be double sealed to prevent foreign particles from entering and preserve the quality of lubricant BulletPoint4 : Long Term Use: Alloy steel linear motion bushings have smooth surface, low noise, low friction coefficient, can adapt to various environments and long-term use BulletPoint5 : Widely Used: Cylindrical linear bearings are used in conjunction with linear bearings and are suitable for industrial automation equipment such as 3D printers, food machinery, packaging machinery, engraving machines, XYZ modules, etc. Color : One Color ExternallyAssignedProductIdentifier : 9174596168671 IncludedComponents : No ItemName : 10 Pcs LM12UU Linear Ball Bearing, 12mm Bore Dia Linear Motion Bushing with Double Side Rubber Seal, Alloy Steel Rubber Sealed Rod Liner Shaft Parts for CNC Machine 3D Printer ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 10 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : linear-ball-bearings Manufacturer : Yuecoom ModelNumber : Yuecoom8eyop23g0v NumberOfItems : 1 PartNumber : Yuecoom8eyop23g0v ProductDescription : It's suitable for bearing various parts of various sizes, which are standardized and interchangeable Specification: Item Type: Linear Ball Bearing Material: Alloy Steel Model: LM12UU Inner Diameter: Approx. 12mm/0.5in Outer Diameter: Approx. 21mm/0.8in Height: Approx. 30mm/1.2in Use: Widely used in various industrial fields such as machine tools, construction machinery, robots, speed reducers, steel, metallurgy, textiles, mining, printing, aerospace, and so on