Features BALL BEARING: Lightweight housing and chr-ome steel bearing ba-lls, which has good wear resistance, with high accuracy and strength. GOOD PERFORMANCE: The linear motion rail slide block features glossy operation, has high rigidity, low friction and long service life. MULTIPLE USAGES: Suitable for all kinds of guide rods and columns, used in electrical appliances, electric motors, construction machinery and auto parts. ALUMINUM ALLOY: The slide block is made of aluminum alloy, which is light in weight and corrosion resistant, not easy to wear after long term use. SPECIFICATIONS: SCS8UU linear ba-ll bearing slide block, bearing model is LMF8UU, shaft nominal bore diameter is 8mm, with standard processing. Specification: Item Type: Linear Ball Bearing Slide Block Model: SCS8UU Inner Bore Diameter: Approx. 8mm / 0.3in Material: Aluminum Alloy, Steel Package List: 4 x Slide Block Package List 4 x Slide Block