Purchased on Amazon on October 10, 2024. It was set up in a room for one year. (I don't smoke. I don't have any pets.) -------------------------------------------------- Product Specifications Manufacturer: 3B Scientific Part Number: A300 Item Weight: 1.08 Kilograms Product Dimensions: 18 x 18 x 25 cm; 1.08 kg Size: 1 piece (x 1) Batteries Required: No Product Dimensions (L x W x H): 18 x 18 x 25 cm MSRP: ¥81,400 -------------------------------------------------- This is a skull model that allows observation of the attachment of muscles of the head, such as the masticatory muscles and some facial muscles. The masticatory muscles and other muscles are reproduced in different colors, making them easy to distinguish. The left half shows the origin and insertion of the muscles (origin: red, insertion: blue). The mouth can be opened and closed slightly, allowing for the reproduction of chewing movements. The calvaria and masseter muscle are removable. Designed and quality controlled by 3B Scientific, Germany.