... dark black coating, zinc-plating, silver-plating and so on. The material can be stainless steel, brass etc. ... microphone,conference microphone,meeting microphone,desk condenser microphone,ear microphone,speaker microphone,CD microphone,multifunction table earphone ... and so on. Enterprise Faith: Strict Management, Top Quality, Delivery On Time and Good Services. flex boom for Earphon&headset-FBE204