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One and one-half times the size of a child’s ear. Illustrates semi-circular canals and cochlea of the inner ear, auditory ossicles, otitis media (inflammation and simulated fluid in the middle ear), tympanic membrane, temporal and tympani muscles, plus presents a horizontal eustachian tube typical of a child. Made of durable, high quality materials. Model measures 4-3/4" x 4" x 3-1/2"; base is 6-1/2" x 5" x 1". Card size: 6-1/2" x 5-1/4".