Full-size model features the occipital bone, brain stem, atlas and axis through C7 with herniated disc, T1, and T3. This model has a full nerve with the right side brachial plexus and a soft cerebellum. The muscles include levator scapulae, suboccipital triangle, longus capitis, and scalenus medius posterior and anterior. The right first and second ribs are also featured and include cartilage. 5-1/2" x 6-1/2" x 10" model with 6-1/4" x 8-1/4" key card. Multicolor.