Model Number: 1.0mm,G24 Brand Name: SAILINGBALL Key Specifications/Special Features: Chrome steel balls (bearing balls), 0.5-55mm, G5-1000 Chrome steel ballChemical composition C% Si% Mn% Cr% Cu% S% P% Hardemess 0.90-1.05 0.15-0.35 0.25-0.45 1.35-1.65 0.3 max 0.03 max 0.03 max Through hardened Application: heavy-duty and high-speed bearing, linear motion guidance system (ex ball screw), meter milling, ink and paint grinding, chemical industry, food industry Density: 7.833g/cm³ Grade: 5-milling Size: 1.0mm-1"