... : 100-10004) Hardness ≤HRC205) Surface Treatment: Polished, smooth and sheeny. 6) Applications: be widely used for fuel injectors, sprayers, valves, transmission ... , earrings, necklaces, electronics, switch, touch-spot, military fuse products, etc. 7) Nonstandard dimensions customized are acceptable. decorative brass ball 6mm 6.5mm 7mm