... diaphragm ,rubber diaphragm, titanium diaphragm,horn speaker diaphragm,Speaker Parts1)Material: PEI,PET,PEN,PU,brushed aluminum ,titanium,silk,paper , ... are one of the most competitive enterprises in loudspeaker parts product line in china,the total investment of company is RMB ... professional and punctual . Also we use standard carton for package(Carton pass the compressive tester).1.Our company has an ...