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Gcr15 material, solid precision bearing steel balls, high-precision, wear-resistant and pressure-resistant, smooth surface, high-quality bearing machinery! PRODUCT SPECIFICATIONS 10.319/11.113/11.5/11.9/12.3/12.5/12.7mm 1kg Exquisite appearance, precise oil pressure, stable structure, polished and ground without burrs, robustness without loss of roundness, high quality and beautiful appearance! Bearing steel material:GB308-2002, hardness can be above HRC60, high hardness, wear resistance, smooth surface The steel ball adopts the design of polishing technology, with smooth and round surface. › See more product details; Product description PRODUCT SPECIFICATIONS 10.319/11.113/11.5/11.9/12.3/12.5/12.7mm 1kg Bearing steel material:GB308-2002, hardness can be above HRC60, high hardness, wear resistance, smooth surface 10.319 mm, 1 kg = 220 pieces. 11.113 mm, 1 kg = 175 pieces. 11.509 mm, 1 kg = 160 pieces. 11.906 mm, 1 kg = 143 pieces. 12.3 mm, 1 kg = 130 pieces. 12.5 mm, 1 kg = 123 pieces. 12.7 mm, 1 kg = 118 pieces; Product description PRODUCT SPECIFICATIONS 10.319/11.113/11.5/11.9/12.3/12.5/12.7mm 1kg Bearing steel material:GB308-2002, hardness can be above HRC60, high hardness, wear resistance, smooth surface 10.319 mm, 1 kg = 220 pieces. 11.113 mm, 1 kg = 175 pieces. 11.509 mm, 1 kg = 160 pieces. 11.906 mm, 1 kg = 143 pieces. 12.3 mm, 1 kg = 130 pieces. 12.5 mm, 1 kg = 123 pieces. 12.7 mm, 1 kg = 118 pieces; PRODUCT SPECIFICATIONS 10.319/11.113/11.5/11.9/12.3/12.5/12.7mm 1kg Bearing steel material:GB308-2002, hardness can be above HRC60, high hardness, wear resistance, smooth surface 10.319 mm, 1 kg = 220 pieces. 11.113 mm, 1 kg = 175 pieces. 11.509 mm, 1 kg = 160 pieces. 11.906 mm, 1 kg = 143 pieces. 12.3 mm, 1 kg = 130 pieces. 12.5 mm, 1 kg = 123 pieces. 12.7 mm, 1 kg = 118 pieces