SIZE:0.5mm to 4" GRADE:G10 - G1000 produce in large qty with best price and quickly deliverying time Steel balls for bearings, all industries, etc. Carbon balls, Chrome steel balls, high carbon steel balls, stainless steel balls.The size is from 0.5mm to 4", the material would include low carbon balls - AISI 1015, High carbon balls- AISI 1085, High carbon Chrome balls SAE 52100, all kinds of ...