Features<br> These steel balls are made of high quality Gcr15 bearing steel for pressure resistance and abrasion resistance<br> Excellent surface quality, high hardness and high load bearing capacity<br> Steel ball diameter is 6.35mm(1/4inch), and the tolerance is ±0.002mm<br> There are total 200 pieces in one set that you may use for many projects<br> Mainly used for industrial products such as hardware tools, electrical appliances, casters, bearings, etc<br> Features: These steel balls are made of high quality Gcr15 bearing steel for pressure resistance and abrasion resistance. Excellent surface quality, high hardness and high load bearing capacity.<br> Steel ball diameter is 6.35mm(1/4inch), and the tolerance is ±0.002mm.<br> There are total 200 pieces in one set that you may use for many projects.<br> Mainly used for industrial products such as hardware tools, electrical appliances, casters, bearings, etc.<br> <br> Specifications: Material: Bearing steel Gcr15 Diameter: 6.35mm(1/4") Grade: G10 Hardness: HRC65 Tolerance: ±0.002mm Quantity: 200pcs<br> Package Includes: 200 x Steel Balls<br> Package List<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store