The Combined Nomenclature (CN), v1:2018
9023 00 80: Instruments, apparatus and models designed for demonstrational purposes, e.g. in education or exhibitions, unsuitable for other uses (excl.
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=bdccfab4-a71c-4f32-8b96-d3d9ed56013c