Features: Spine Model: The model consists of the posterior occipital bone, 5 cervical vertebrae, intervertebral discs and nerves, cervical vertebral artery, the body proportion of 1:1. Material: It made of PVC environmentally friendly materials, quality prototypes, handmade in a solid, non-broken. Almost trues display of human basal nucleus structure. Easy to assemble and disassemble, so you can use this model to explain the relevant knowledge to students and promote students understanding and mastery. Shape: Realistic cervical vertebrae designs, the cervical vertebra is located belows head, above the thoracic vertebrae. Its very easy to observe and learn. Lab Supplies: PVC material does not have to worry about being broken by students, so It will be a great addition to your lab supplies. Great for school teaching tool, and learning display. Specifications: Material: PVC Color: As The Picture Shows Package Weight: approx.350g Style Options: 5 Style are Available as Shown in the Picture. Size: As The Picture Shows Package Includes: 1Pc x Spine Model note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!