... 3. Good air tightness 4. Environmentally-friendly Specification: 1. Material: -Aluminium Alloy - UPVC Materials (Model: 60, 70, 80, Chameber: 3, ... Refective glass, LOW-E glass, Patterned glass, etc. 5. Aluminium Surface Finish: Anodizing, Powder Coating, Grinding, Blasting, PolishingUPVC Surface Color ... Package: Plastic sheet + Carton + Wooden box / Pallets / Iron Shelf Aluminium Folding Window, UPVC