On 8 November 2007, the European Commission (Commission) conducted an unannounced visit of cathode ray tube manufacturers as part of an investigation into suspected infringements of Article 81 EC. Cathode ray tubes are used in the production of television and computer monitors. Such inspections form part of the early stages of a cartel investigation. The length of the Commission’s investigation will depend on the complexity of the matters and the co-operation of the parties concerned.