The Combined Nomenclature (CN), v1:2019
4104 41 59: Full grains leather, unsplit and grain splits leather, in the dry state "crust", of hides and skins of bovine "incl. buffalo" animals, with a surface area of > 2,6 m² "28 square feet", without hair on (excl. further prepared and whole hides and skins and East India kip of subheading 4104.41.11)
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=ec3af576-673e-42d6-892f-12eb18291831