20 Variable and/or plug-in frames or rails, and structural fastenings therefor, all of plastic or mainly of plastic, attachable to facades or other load-bearing structures, tensionable and/or slidable, for inserting or mounting advertising carriers and coverings of textile, in particular advertising carriers of textile; prefabricated, modular furniture, racks and product presentation racks for use in shops and trade fairs; parts for the aforesaid goods, included in this class, namely fitted profiles, in particular system profiles, profile connectors, end caps for profiles, suspension devices and frames for variable and/or plug-in frames or rails, tensionable and/or slidable, for inserting or mounting advertising carriers; fastenings, not of metal, for suspending advertising carriers and for attaching industrial textiles to frame systems or to fastenings for mounting advertising carriers, in particular eyes for fastening