EWT70 system with a profile depth of 70 mm allows the use of glass up to 58 mm. The 3-chamber structure is the most important element in providing high resistance of the system against different climatic conditions. Performance tests conducted in international accredited institutions have been a factor in determining the strength criteria of the system. The system, which is designed with Euro-Groove channel and can be used with all opening mechanisms, is suitable for all openings such as opening in or out, double opening, transom window for windows and doors. At the same time, PVC compatible opening mechanisms can also be used with the system.