The Combined Nomenclature (CN), v1:2025
9406 90 38: Buildings, prefabricated, whether or not complete or already assembled, made entirely or mainly of iron or steel (excl. mobile homes, greenhouses
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=07469aa8-16e3-44d3-bd95-f5f4a5cf5be9