The Combined Nomenclature (CN), v1:2018
9017 30 00: Micrometers, callipers and gauges (excl. gauges without adjustable devices of subheading 9031.80)
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=bdccfab4-a71c-4f32-8b96-d3d9ed56013c