What are the cavity, door, and glass tray made of Xiaomi Microwave Oven?

The materials of different components of the Xiaomi Microwave Oven are shown below:
Inner (Cavity): Cold rolled sheets, with epoxy coating;
Oven door & observation window: Tempered glass;
Glass tray: Silica;
Waveguide mask: Mica plate; 
Heat insulation sheet: PET;
Door frame seals: ABS.