Enlarged approximately four times, this plastic model dissects into four parts. The detachable petrous portion of the temporal bone reveals the middle and inner ear chambers. Also removable is the tympanic membrane with malleus and incus, and the attached stapes. The external ear is represented by the auricle and auditory canal. Comes complete with instruction manual. Mounted on a sturdy base. Dimensions: 14" x 6-1/2" x 10".