Model Number: 1/8 INCH,3.175mm,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 0.3Max 0.03Max 0.03Max Through Hardened Application: Heavy duty and high-speed bearing, linear motion guidance system (ball screw), meter milling, ink and paint grinding, chemical industry,food industry. .Density: 7.833g/cm .Grade: 5~milling .Size: 1.0mm~1"