SECTION IX - WOOD AND ARTICLES OF WOOD; WOOD CHARCOAL; CORK AND ARTICLES OF CORK; MANUFACTURES OF STRAW, OF ESPARTO OR OF OTHER PLAITING MATERIALS; BASKETWARE AND WICKERWORK > CHAPTER 44 - WOOD AND ARTICLES OF WOOD; WOOD CHARCOAL > 4406 Railway or tramway sleepers (cross-ties) of wood > Not impregnated