Features High quality: the spine model study is made of synthetic materials that are durable and unbreakable. Stable metal support frame with 5 rollers. Close to the real weight of about 200 pieces of bones. The limb of spine anatomy model can be removed quickly and easily. Natural bone size with 3 parts of assembled skull 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 ideal 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: 45cm/17.72in 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 1-3cm error due to the manual measurement. Thanks for your understanding. Package List