Feature: 1. [EXCELLENT PERFORMANCE] This linear bearing black has high accuracy and speed, with smoothly surface, low friction, not easy to stuck, and has ultra low noise. 2. [ALUMINUM ALLOY MADE] Aluminum slider has high hardness, good wear resistance, contact fatigue strength and toughness, can withstand high impact load. 3. [REASONABLE INNER DESIGN] The ball inside the linear slider is reasonably distributed, the spacing is uniform, making the work more stable. 4. [HIGH ACCURACY] The linear ball bearing slide block has been finely made, with precise size, easy to install and use. 5. [WIDE APPLICATION] This slide block can be widely used in various industrial fields such as machine tools, engineering machinery, robots, etc. Specification: Item Type: Linear Ball Bearing Slide Block Material: Aluminum Alloy Model: SBR12UU Use: Widely used in various industrial fields such as machine tools, engineering machinery, robots, reducers, steel, metallurgy, textile, mining, printing, aerospace, etc.. Package List: 4 x Linear Ball Bearing Slide Block