Much like small ear model, the larger model is enlarged four times External ear is represented by the auricle and auditory canal Includes a detailed key Includes a sturdy base and is made out of strong plastic Attributes to this model are the ability to dissect portions of the ear into six parts Much like small ear model the larger model is enlarged four times. Attributes to this model are the ability to dissect portions of the ear into six parts. Portions that come apart are the tympanic membrane with the malleus, incus, and attached stapes. The petrous portion of the temporal bone, which reveals the middle and inner ear chambers, and the external ear is represented by the auricle and auditory canal. This model includes a sturdy base and is made out of strong plastic. Included is a detailed key.Product Dimensions (L x W x H): 450 x x 193 Product Weight: 4.400625 LB