CPV code 14721000 designates Aluminium in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
14721000 sits under 14720000 (Aluminium, nickel, scandium, titanium and vanadium) and groups 1 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.