... air tightness 4. Environmentally-friendly Specification: 1. Material: -Aluminium Alloy - UPVC Materials (Model: 60, 70, 80, Chameber: 3, 4, 5, 6 ... : Customized; drawing draft for customer information. 4. Glass: Single glass, Double glass, Clear glass, Tempered glass, Refective glass, LOW-E glass ... sheet + Carton + Wooden box / Pallets / Iron Shelf Aluminium Folding Window, UPVC