What material is the elevator advertisement made of?

At the elevator door, most of them now have a TV. There is a photo frame advertisement in the elevator-all sides are plexiglass and transparent acrylic, and the large picture is generally made of plexiglass, and the small picture can be made of acrylic. The main reason is the fear of acrylic deformation, the service life and price of plexiglass. Frames-most of them are hard plastics now, and of course there are aluminum profiles. How to choose depends on your budget price and your actual needs.