... . Sound insulation 3. Good air tightness 4. Environmentally-friendly UPVC Single Hung Window Specification: 1. Material: UPVC (Model: 60, 70, 80, Chameber: 3 ... 3. Size: Customized; drawing draft for customer information. 4. Glass: Single glass, Double glass, Clear glass, Tempered glass, Refective glass, LOW ... . Package: Plastic sheet + Carton + Wooden box / Pallets / Iron Shelf UPVC Single Hung Window