... steel 3, Fast Tooling; 4, ISO9001:2008 5, over 10 years' 1, headband headset with microphone/ skype headphone OEM2, manganese steel3, Fast Tooling;4 ... , over 10 years' experience manufacture6, Material: Managese steel, heat treatment, is hard to out of shape. Tin plate makes the surface ... more beautiful.It can be used inside platic headset. We can provide mould and ...