Lifetime Flexible Spine Model with Femur Heads This spine is the last spine you will ever need! Specially mounted on a flexible core, adding extra stability to the spine. Ideal for active and hands on use, this spine is great in schools or in a doctors office for patient education. This spine is extremely good value and durable. The spine features the following: Complete pelvis and occipital plate Full flexible mounting throughout spine L3-L4 disc prolapsed on spinal column Spinal nerve exits Cervical vertebral artery Male pelvis With movable mounted femur heads