* Aluminium 6063-T5, a high-tech material for profiles and reinforcement. *High quality glass fiber thermal break insulation bar with high loading capacity *10-15 years warranty in powdercoating surface treatment *System of multiple hardware locks for weatherproofing and burglar resistance *Corner locking key ensures the smooth surface joint and improves corner stability *Glass panel EPDM foam weather sealing strip used for better performance and easier maintenance than standard glue