China 6.1mm Low Carbon Steel Ball AISI1010-AISI1015 G100 Grade AISI 316 4mm Stainless 0.3mm Steel Ball, Carbon Steel Ball for Bearing, Find details about China Steel Ball, Carbon Steel Ball from 6.1mm Low Carbon Steel Ball AISI1010-AISI1015 G100 Grade AISI 316 4mm Stainless 0.3mm Steel Ball, Carbon Steel Ball for Bearing