This realistic model details 2 lumbar vertebrae with spinal nerves, dura mater of spinal cord. The anatomy model includes 2 replaceable dorso-lateral prolapsed discs between the 4th and 5th lumbar vertebrae. The Lumbar spinal column is delivered on a removable stand. Now included with all 3B Scientific Anatomy models is the 3B Smart Anatomy app. This app allows users to register their 3B item to extend the warranty from 3 to 5 years plus free 1 year access to the 3B Smart Anatomy app which includes 23 Anatomy lectures, 117 interactive models and 39 quizzes.