Tuberculin syringes, also known as insulin syringes, are used for administering small volumes (less than 1 mL) of medicines, particularly for subcutaneous injections (beneath the skin). Tuberculin syringes are commonly used for injecting medications such as insulin, vaccines, and other types of medications that require accurate dosing in small volumes. Tuberculin syringes have a smaller and finer needle compared to regular syringes, making them suitable for injections in areas with high sensitivity and for patients who need precise dosing of medications. Tuberculin syringes are also used for diagnostic purposes in tuberculin skin tests, where a small amount of tuberculin is injected just under the skin to test for tuberculosis infection.