According to Dr. Lie. Life-size, in SOMOS-Plast. Presentation of normal anatomy in conjunction with pathological changes: I. Normal anatomy, II. Anulus fibrosus according to Rumpert, III. Medio-lateral nuclear prolapse, IV. Medial prolapse, V. Spinal stenosis, VI. L-4 vertebral spondylolysis. Separates altogether into 10 parts. Height: 13 cm., width: 14 cm., depth: 15 cm., weight: 500 g.