6 Common metals, unwrought or semi-wrought, and their alloys for the manufacture of mountaineering and climbing articles; rolled and cast metal building materials for the manufacture of mountaineering and climbing articles, climbing irons, pitons, climbing stirrups, hooks for carriers, masts of metal, metal stakes, karabiners, metal buckles, fasteners for crampons, ores; pulleys of metal (other than for machines), expansion pitons, metal platforms, metal ladders, metal climbing boards, chocks