The main material of those parts is polyester PET film wich surface of the highly electroplate. And the color just like sliver. There are 2 type of those products one is One-sided bright silver and bottom surface application of gum another is two-sided bright

Silver PET lens Advantage: Heat- Resistanc, breakage-proof. Brightness is outstanding, the reflection and the illumination are extremely good and the clarity close mercury real mirror splendid Heat- Resistanc, breakage-proof. Brightness is outstanding, the reflection and the illumination are extremely good and the clarity close mercury real mirror splendid.