The description: ? The ear includes the outer ear, the middle ear and the inner ear. The auditory receiver and the sensory sensor being located in the inner ear, the ear is also called a listener. Some people also cited the outer ear and the middle ear as the auditor's appendages. The outer ear includes the auricle and the external auditory conduit. ? The model includes five parts: the outer ear, the middle ear, the sacred rock and the inner ear. ? The model shows the auricle, the external auditory duct, the tympanic cavity of the middle ear, the tympanic membrane and the auditory bone, the eustache trunk and the sacred rock and the inner ear lost. Size: 4x magnification, height 21cm, width 33cm, thickness 23cm Material: Ecological PVC Note: Please allow a small color difference due to a different display or a different light environment. As it is a manual measurement, the size of the product has a small beach error. Please refer to the actual product, please understand. Please do not hesitate to e-mail if there are problems and questions, we will do our best to meet your satisfaction within 24 hours.Laboratory Supplies: PVC material does not have to fear being broken by students, it will be an excellent addition to your laboratory supplies. Ideal for school education tool, learning display and collectibles. Digital Signs: Model We have specially designed digital indicator panels, convenient for you to learn accurately and efficiency, in order to better understand and learn at learning .Save and improve learning efficiency. Material: Food grade PVC of environmentally friendly materials, computer color match, hand-painted.almost Real display high quality of the human ear structure.Size: 21cm high, 33cm wide, 23cm thick. Study aid: The part of the external channel of the Tibial rock of the model can be moved, picked up and open, and the tympanum membrane, the hammer bone and the anvil can be separated.so it will be the best tool Auxiliary for your in-depth research. Ear model shows in detail the different anatomical structures of the human ear, the middle ear and internal ear. You can explain the relevant lively knowledge for model students, allow students to understand quickly and master, thus improving Learning efficiency.