微型钢球，小钢珠，小型钢球:
1.材质:
不锈钢(216L,420,440,440C);
轴承钢GCr15, AISI52100, SUJ2, 100Cr6;
碳钢Q235,AISI15;
2.规格: 0.3mm-----3.969mm
0.3mm,0.4mm,0.5mm, 0.6mm, 0.7mm , 0.8mm,1.0mm, 1.2mm,1.30mm,1.35mm,1.40mm,1.45mm,1.50mm,1.588mm,1.60mm,,2.0mm ,2.381mm，2.5mm，2.778mm,3mm,3.175mm,3.5mm,3.969mm,