1, CE/SONCAP certificate 2, UV resistant 3, High quality hardware: Multi-point lock and ... double glass, double glass with grille, even tripled glass. 4mm,5mm,6mm,8mm; Space:6mm,9mm,12mm. Clear glass, Temperted glass ... air glass and so onReinforcement steelThickness: 1.2mm, 1.5mm, 2.0mm, 2.5mm; U form galvanized steelSealrubber sealing strip, black or gray color ...