CPV code 42994100 designates Machines for the production of plastic windows and frames in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
42994100 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 42994000 (Machinery for working rubber or plastics).