... No. 59-1, H62, Red Copper 3) Grade: 100-1000 Brass Balls Red Copper Balls1) Specifications: diameter from 1.0mm to ... , jewelly, bracelet, earrings, necklaces, electronics, switch, touch-spot, military fuse products, etc. 7) Nonstandard dimensions customized are acceptable. Chemical Composition of ... ≤0.08≤0.005≤0.002≤0.01≤0.5Remainder brass and red copper ball