... .materil:copper,iron,aluminium,Kover 2.metal stamping parts 3.case for crystal oscillator metal case for crystal oscillator1.materil:copper,iron ... SGCC(galvanized sheet),stainless steel, copper, brass, aluminum,etcFinish:zinc/chrome/nickel plating,electrophoresis paint,powder coating ,anodize,etcColor: ... and surface treatment conform to ROHS environmental requirements metal case for crystal oscillator