Metal mesh is used for earphone.   We professionally manufacture all kinds of metal components through etching process.  1,Product thickness can be achieved between 0.03 to 1.5mm.  2,Product size can be achieved between 1* 1mm to 300* 500mm.  3,Smallest open hole is Ø 0.1mm.  4,Smallest line width is 0.025mm.  5,Product precision is ± 0.01mm (common difference). It’s generally 20% of material thickness  If you're interested in our products,you can contact us at any times for the further information