This is a polyurethane cast of a real adult skull. It accurately represents the adult male cranium in late middle-age. It is hand finished with natural bone color and looks extremely realistic. The mandible is removable, but also attaches to the cranium and can open and close. The cast is hollow and is lighter than a real human skull. Although the inside of the cast is not detailed, most of the orifices in the cranium have pass-through as they would for a real specimen. This is one of the most realistic model skulls on the market.