1. Prepared based on the actual lumbar vertebrae data of adults, the dorsal arc surface structure;

2. Applicable to the development of various brands of ultrasonic equipment;

3. Built-in cone T11-T12, L1-L5 lumbar segment structure;

4. It has structures such as articular processes, spinous processes, transverse processes, vertebral arches, and lamina;

5. It can meet the requirements for simulation practice and teaching of puncture and injection under ultrasound guidance.

6. Exercise hand-eye coordination and basic skills training under ultrasound guidance.