ISO 8536-4:2007 specifies requirements for single-use, gravity feed infusion sets for medical use in order to ensure their compatibility with containers for infusion solutions and intravenous equipment. Secondary aims of ISO 8536-4:2007 are to provide guidance on specifications relating to the quality and performance of materials used in infusion sets and to present designations for infusion set components. In some countries, the national pharmacopoeia or other national regulations are legally binding and take precedence over ISO 8536-4:2007.