The Combined Nomenclature (CN), v1:2018
8310 00 00: Sign-plates, nameplates, address-plates and similar plates, numbers, letters and other symbols, of base metal, incl. traffic signs (excl. those of heading 9405, type and the like, and signal boards, signal discs and signal arms for traffic of heading 8608)
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=bdccfab4-a71c-4f32-8b96-d3d9ed56013c