The Highly Flexible Spine Model is designed with a flexible core, adding extra stability to the spine. It is ideal for educational hands-on demonstrations in either schools or doctorÃ¢ÂÂs offices. It features a complete male pelvis and occipital plate, L3-L4 disc prolapsed, spinal nerve exits, cervical vertebral artery. 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.