DELTA profile, titanium white frame, 4-way, 293x 80mm DELTA m-system - design and quality in perfection from Siemens. Our m-system offers different module inserts for reporting and communication purposes. The Siemens m-system offers the following advantages: 1. Due to the modular design, the inserts can be used with DELTA line, DELTA miro, DELTA profil and Delta style. 2. A module carrier can be equipped with up to two different functions. www.siemens.de/delta. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe, efficient electrical infrastructure in buildings and industry.