* Aluminium alloy 6063-T5, high tech profile and renforce material *High-quality thermal break insulation made of glass fibre has a large loading capacity. *With powdercoating surface treatment, there is a 10–15 year warranty. *Multi-point hardware lock system for weather sealing and burglarproofing *Corner locking key ensures the smooth surface joint and improves corner stability *Instead of ordinary glue, glass panel EPDM foam weather sealing strip provides higher performance and ease of maintenance.