Feature 1Made of synthetic materials that are durable and unbreakable. 2Stable metal support frame with 5 rollers. 3Close to the real weight of about 200 pieces of bones. 4The limbs can be removed quickly and easily. 5Natural bone size with 3 parts of assembled skullSpecification Descriptions: This spine model shows all the main features of each bone in great detail, including the spine, nerve roots, vertebral arteries, divided discs, transverse processes of the spine, and vertebral sections. It is an great;teaching models for chiropractic, orthopedic, and other medical specialties. ; Features: 1. Made of synthetic materials that are durable and unbreakable. 2. Stable metal support frame with 5 rollers. 3. Close to the real weight of about 200 pieces of bones. 4. The limbs can be removed quickly and easily. 5. Natural bone size with 3 parts of assembled skull ; Specifications: Material: PVC Color: White Overall Length: 38cm/14.96in Weight: Approx. 585g ; Package Includes: 1 x Spine Model 1 x Model Base ; Note: 1. Due to the difference between the monitors and light effect, the picture may not reflect; the actual color of the item. 2. Please allow 13cm error due to the manual measurement. Thanks for your understanding. 3.;Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.4. Orange or yellow color of the silicone on the model will be sent randomly,;and make sure you will not mind before ordering.