What are Bezels? Bezels allow you to create a more realistic looking panel by overlaying the monitor with a thin board of some kind of material with cutouts for the instrument to show through. On this panel you then attach Bezels to simulate a realistic looking instrument panel. How do I attach them? This is depending on the material you want to attach them to. We suggest a either a medium to thick super-glue or epoxy glue. There are 2 basic shapes, round and square in different sizes. Plus there is a special bezel for the HSI and a 3-part engine gauge bezel.