Natural cast, in SOMSO-Plast. Removable vault. Lower jaw is movable and modelled to show the roots of the teeth and their network of vessels. Base of the skull and roof with markings in colour of the venous sinus of the dura mater of the brain and the arteries, with notation and explanation in English and Latin. Separates into 3 parts. Length: 17.5 cm., width: 14.1 cm., size: 51.2 cm., weight: 800 g.