BS-23 – Natural cast, in SOMSO-Plast. With representation of arterial network of vessels. Separates into 9 parts: frontal and parietal lobes (2), temporal and occipital lobes (2), medulla (2), cerebellum (2), and basilar artery. On a base. Height: 17 cm., width: 16 cm., depth: 17 cm., weight: 1.2 kg.