The Combined Nomenclature (CN), v1:2018
9506: Articles and equipment for general physical exercise, gymnastics, athletics, other sports, incl. table-tennis, or outdoor games, not specified or included in this chapter or elsewhere; swimming pools and paddling pools.
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=bdccfab4-a71c-4f32-8b96-d3d9ed56013c