... shell Honeycomb core Low thermal expansion coefficient Long service span Customization available Metallic substrate has the advantages of fast burning, small volume, ... We can supply both metallic substrate coated with noble metals of Pt, Pd, Rh and metallic element without noble metals. ... Note: We can supply Metallic Substrate coated with noble metals of Pt, Pd and Rh. We also supply Metallic Substrate ...