1. Excellent anti-waterness and anti-airness 2. Sound insulation 3. Generous and bright 4. Environmentally-friendly Product Specification:Material Aluminum Alloy + GlassGlass EquipmentSingle / Double Glass, Low-E Glass, Tempered Glass, Hollow Glass, Clear Glass, Refective Glass,Coating GlassMaterial Coloursilver/ bronze or as requiredAccessoriesLocks,Hinges,Screws,Glass,Glass Cement ...