CPV code 42390000 designates Parts of furnace burners, furnaces or ovens in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
42390000 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 42300000 (Industrial or laboratory furnaces, incinerators and ovens).