Zinc alloy die casting housing &case &ring & arm for phone &earphone & cell phone. The customized design and flash styles. Production Process: Drawing or Samples→Mould Making→Testing Mould→Die Casting→deburring→Drilling & Threading→CNC Machining→Polishing→ Surface Treatment→Assembling→Quality Inspection→Packing→Shipping. HFX offers different kinds of zinc alloy die casting headphone parts, you can customize the corresponding products according to your needs.