* Aluminium alloy 6063-T5, high tech profile and renforce material *High-grade glass fibre thermal break insulation with a considerable loading capacity *10-15 years warranty in powdercoating surface treatment *Multi-point hardware lock system for weather sealing and burglarproofing *Corner stability is improved and the smooth surface joint is ensured by the corner locking key. *For greater performance and simpler maintenance than ordinary glue, glass panel EPDM foam weather sealing strip is employed.