The focus of this poster design is to convey the fascination of modern connection technology. Its main characteristic is the use of the basic geometric shape of the circle as a symbol for the two basic materials used by Osterrath: tube and sheet metal. These materials are organised in a flexible pattern based on punching tools and technical drawings. The resulting symbol thus also evokes the impression of the “squaring of the circle” – the mathematical approach of constructing a square with the same area as a given circle using geometric means.