1、Made of premium steel material, corrosion resistance and rust resistance. 2、High accuracy, stable performance, long service life and high reliability. 3、Deep groove raceway with single column ball bearing ensure the efficient operation of steel balls. 4、Exquisite mechanical design makes little noise when rotating. 5、Fine workmanship, smooth surface, excellent mechanical properties. Features: 1. Made of premium steel material, corrosion resistance and rust resistance. 2. High accuracy, stable performance, long service life and high reliability. 3. Deep groove raceway with single column ball bearing ensure the efficient operation of steel balls. 4. Exquisite mechanical design makes little noise when rotating. 5. Fine workmanship, smooth surface, excellent mechanical properties. Specification: Condition: 100% Brand New Item Type: Bearings Cage and its Materials: Steel Plate Use Characteristics: High Speed Uses: General Number of Rolling Body Columns: Single Column Raceway Type: Deep Groove Raceway Bearing Material: Bearing Steel Rolling Body Type: Ball Angle: 15 Degrees Sealing Cover: Double-sided seal Rolling Body: Steel Ball Model & Size: MR52ZZ/MR63ZZ/MR74ZZ/MR85ZZ (optional) MR52ZZ (2*5*2.5mm): 2 * 5 * 2.5mm / 0.1 * 0.2 * 0.1in MR63ZZ (3*6*2.5mm): 3 * 6 * 2.5mm / 0.1 * 0.2 * 0.1in MR74ZZ(4*7*2.5MM): 4 * 7 * 2.5mm / 0.2 * 0.3 * 0.1in MR85ZZ(5*8*2.5MM): 5 * 8 * 2.5mm / 0.2 * 0.3 * 0.1in Package List: 10 * Bearings Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.