Natural size, in SOMSO-Plast. Prolapse of the pulpous nucleus, prolapse of the intervertebral disc on the 4th and 5th lumbar vertebra, compression of the dural sack with cauda equina caused by the hernia. 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.