Features:_x000D_ 1. Made of premium steel material, corrosion resistance and rust resistance._x000D_ 2. High accuracy, stable performance, long service life and high reliability._x000D_ 3. Deep groove raceway with single column ball bearing ensure the efficient operation of steel balls._x000D_ 4. Exquisite mechanical design makes little noise when rotating._x000D_ 5. Fine workmanship, smooth surface, excellent mechanical properties._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Type: Bearings_x000D_ Cage and its Materials: Steel Plate_x000D_ Use Characteristics: High Speed_x000D_ Uses: General_x000D_ Number of Rolling Body Columns: Single Column_x000D_ Raceway Type: Deep Groove Raceway_x000D_ Bearing Material: Bearing Steel_x000D_ Rolling Body Type: Ball_x000D_ Angle: 15 Degrees_x000D_ Sealing Cover: Double-sided seal_x000D_ Rolling Body: Steel Ball_x000D_ Model & Size: MR52ZZ/MR63ZZ/MR74ZZ/MR85ZZ (optional)_x000D_ MR52ZZ (2*5*2.5mm): 2 * 5 * 2.5mm / 0.1 * 0.2 * 0.1in_x000D_ MR63ZZ (3*6*2.5mm): 3 * 6 * 2.5mm / 0.1 * 0.2 * 0.1in_x000D_ MR74ZZ(4*7*2.5MM): 4 * 7 * 2.5mm / 0.2 * 0.3 * 0.1in_x000D_ MR85ZZ(5*8*2.5MM): 5 * 8 * 2.5mm / 0.2 * 0.3 * 0.1in_x000D_ _x000D_ Package List:_x000D_ 10 * Bearings_x000D_ _x000D_ Note:_x000D_ 1. Please allow slight error due to manual measurement. Thanks for your understanding._x000D_ 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.