1. This model uses a fifth segment lumbar vertebra and a fifth lumbar vertebra, which are composed of a soft elastic body, which is convenient for the user to demonstrate the 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, physical education, etc. 3. Made of high quality PVC, and it is easy to wash. washable. Only lumbar vertebrae model, other accessories shown in the picture are not included. Specifications Material: PVC. Colour : yellow. Type : lumbar vertebrae. Model dimensions : approx. 10 x 10 cm (as shown in the picture). Quantity: 1 piece. Please allow 0 to 1 cm error due to manual measurement. Please make sure you do not mind before bidding. bid. Due to differences between different monitors, the picture may not reflect the actual colour of the item. thank you Package Include 1 lumbar vertebrae model