19 Components for prefabricated cabanas and heat cabins [building structures] of timber and/or of plastic, especially booths of timber and/or of plastic and related parts; building structures, namely, sauna cabins of wood and/or plastic and parts therefor; parts for steam baths [building structures], consisting primarily of cabins of timber and/or of plastic; building structures, namely, components for solariums; all the aforesaid goods included in this class