1. This model uses a fifth-segment lumbar vertebra and a fifth lumbar vertebrae, which are composed of a soft elastic body, which is convenient for the to demonstrate, lumbar disc herniation, and shows the changes of the human intervertebral disc when the human body bends when it is distorted, 2. This model is widely used in orthopedics, surgery, for clinical teaching, occupational disease prevention, ergonomics, education, etc. It has good auxiliary teaching and demonstration 3. Made of high-quality PVC, and it is easy to wash. 4. Lumbar Vertebrae Model only,ther accessories demo in the picture is not included. brand new and high quality Specifications: Type: Lumbar Vertebrae Model Colour:As shown Material:PVC Package Contents: 1 * Lumbar Vertebrae Model Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.