The upgrade numbered anatomical skull model is improved by a new laser-Etched technology to make the fonts & number engraved into the skull model permanently. The laser-Etched fonts & number will NEVER be smudged while our skin touch the number & fonts. The skull model are able to be clean and the number & font will Never be wiped off. Old version Skull with irregular fonts, font faded easily and font errors, number missing caused by hand writing. New version skull with uniform, regular font, not faded. Upgraded Human anatomical skull model maintain the important function for the medical human skull structure learner. It can be disassembled into 3-part: Calvaria, Base of Skull, and Mandible. The skull model made in non-toxic PVC material, tasteless, environmentally friendly. Also attached with a instruction sheet for user.