Spinal column models are flexible and designed for hands-on demonstrations. Features male pelvis and occipital plate, L3-L4 disc prolapsed, spinal nerve exits, cervical vertebral artery. Didactic model has the same features of the Classic Spine, as well as Didactic painting to differentiate the five sections of the spinal column. Stand is not included. 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.