... 3. Good air tightness 4. Environmentally-friendly Specification: 1. Material: UPVC Materials (Model: 60, 70, 80, Chameber: 3, 4, 5, 6 ... glass, Refective glass, LOW-E glass, Patterned glass, etc. 5. UPVC Surface Color: White 6. Accessary: Made in China / Germany 7 ... 10. Package: Plastic sheet + Carton + Wooden box / Pallets / Iron Shelf UPVC Casement Window