... and grains on the surface.Cu Complex (Cu+GI/EGI/GA/CR/AL)Component: Outside: Cu platesMiddle: Adhesive resinInside: Galvanized ... plates/AL + galvanized platesSpecialty: Keep the external stamp of Cu plates, corrosion resistance, shocking proof, soundproof, heat resistance, cost ... innovative.•PCM, PCM with metal color and high-reflect, PET (with the best quality surface), single side or both ...