The age of the skull was determined by referring to the natural bone specimen and a panoramic radiograph, both of which suggest a range from 7.5 to 12.5 years. The root apices of the permanent incisors and first molars are almost completely formed. The spheno-occipital synchondrosis is open. The anterior intra-occipital suture is closed.nnSpecifications:nn1:1 scalenPolyurethane resin castn2-part skull (separate cranium & jaw)nnSkull Length 18 cm (7.1 in.)nnSkull Width 12.6 cm (5 in.)nnSkull Height 17.1 cm (6.7 in.)nnStand Comes Complete With A Custom Cradle Designed Specifically For This SkullnnProduct of Bone ClonesnnPlease be advised that this product is made to order and will require additional lead time. For further information about the availability and turnaround time of this item, please contact our customer service team at 1-800-659-SKULL.