CPV code 66514120 designates Marine, aviation and other transport insurance services in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
66514120 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 66514100 (Insurance related to Transport).