Product Name: Bearing Steel BallMaterial: bearing steel GCR15Color: silver white brightHardness: >60HRCSpecification: 5mm-7mmApplication: Bearing steel balls are widely used in high-speed and low-noise bearings, bicycles, motorcycles, automobiles, slide rails, universal balls, luggage, electronics industry, and can also be used to grind other media.G10 bearing steel balls can be used for precision equipment such as ball screws, slider guides, linear bearings, etc.!