The T600N System is designed for Large Window-Wall and Curtain-Wall Assemblies with Extreme Weather Exposure. This system is characterized by a unique ‘Structural-Fin’ mullion and matching 5/8” sight-lines on the exterior and interior faces. The T600N system can be mounted to the building structure for Curtain-Wall installations. All operable units associated with the T450N system are available in the T600N System.