Carbon Steel Ball, Stainless Steel Ball manufacturer / supplier in China, offering AISI 304 316 440 420 4.5mm 8mm 9mm Stainless Steel Ball for Auto Parts Steel Ball, High Precision 1/16′′ 1/8′′ 3/16′′ Size 440c Material Stainless Steel Bearing Balls Steel Ball, 2.778mm Carbon/ High Carbon/ AISI1010/1045 / C15/ C85 Steel Balls for Bearing Steel Ball and so on.