Built of SOMSO-Plast and enlarged approximately 3 times. The auditory canal and petros portion of the temporal bone are removable. The labyrinth can be taken out and opened. The tympanic membrane with malleus and incus can be removed. Altogether has 6 parts. On a green base, with explanation. Height: 21 cm., width: 32 cm., depth: 19 cm., weight: 1.5 kg