* Aluminium alloy 6063-T5, high tech profile and renforce material *High-quality thermal break insulation made of glass fibre has a large 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 *Instead of ordinary glue, glass panel EPDM foam weather sealing strip provides higher performance and ease of maintenance.