4mm Otoscope Ear Specula are used on the ears of adults or older children. With these, cross-infection among patients as well as patient allergic reaction is prevented while still providing the patients with comfort. The 4mm Otoscope Ear Specula is made of a high quality non latex material that helps prevent any latex allergies occurring. Each of the ready to use otoscope ear speculum should only be used by a single patient to prevent the spread of any infection from one to another. These are compatible with Heine otoscope brands many others with Heine fit.