* Aluminium alloy 6063-T5, high tech profile and renforce material *High-quality thermal break insulation made of glass fibre and with a large loading capacity *Powdercoating surface treatment comes with a 15–20 year warranty. *Multi-point hardware lock system for weather sealing and burglarproofing *A corner locking key ensures a smooth surface joint and increases corner stability. *Glass panel EPDM foam weather sealing strip used for better performance and easier maintenance than standard glue