Variable, double-partition welded clean room furniture system for laser welding manufacture: All surfaces are smooth, joint-free and can be easily cleaned in an environmentally friendly manner. Specific angles define drip edges, prevent soiling and provide storage space for objects. Hinges can be adjusted from inside, a silicone joint as seal to the door leaf and the push-to-open mechanism ensure precise and long-lasting service function. Friedrich Sailer GmbH, prototype by the Fraunhofer Institut IPA certified with "Tested Device".