Cast from natural specimen, in SOMSO-Plast. Prolapse of the pulpous nucleus on the 4th and 5th lumbar vertebra, compression of the nerve roots towards the wall of the intervertebral foramen, 4th lumbar vertebra and disc removable. Altogether 4 parts. On a stand with base. Height: 12 cm., width: 12 cm., depth: 12 cm., weight: 270 g.