CPV code 51543300 designates Installation services of leather-production machinery in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
51543300 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 51543000 (Installation services of textile-, clothing- and leather-production machinery).