This product is manufactured and marketed by: Sommerfeldt Oberleitungen + Stromabnehmer GmbH, Friedhofstr. 42, 73110 Hattenhofen, Germany, Tel. +49 7164 3195, eMail: info@sommerfeldt.de . Trade name = trademark = SOMMERFELDT Oberleitungen. The identification marking (e.g. article name, possibly also article number) is stated in the title and in the description. Each assembly instruction in German (I only offer this article for delivery within Germany) can be found in the manufacturer's catalog, which can be downloaded free of charge from the manufacturer's website, but is included in paper form for technically more complex articles. The assembly instructions contain warnings and safety information if required for the article.