supply all kinds of steel balls Chrome steel ball (G10 ~ G1000; 0.5mm~50.8mm) Carbon steel ball(G10 ~ G1000; 0.5mm~25.4mm) Stainless steel ball(G10 ~ G1000; 2.381mm~25.4mm) Brass ball (G100 ~ G1000; 3.969mm~25.4mm)