3B Scientific A283 Bonelike Human Skull Model, Half Transparent and Half Bony Complete with Brain and Vertebrae, 7.1" x 7.1" x 13.4" Adult human skull model with transparent right half and solid left half for comparison of interior and exterior paranasal features Removable left skullcap for display of brain position and sinus courses Colored cranial and paranasal sinuses for ease of identification Flexibly mounted on cervical column, with stand for convenient demonstration Made of plastic for durability and realistic reproduction of the skulls bony structure and