Aluminium chain winder awning window design /Top hung window on China WDMAProduct Description YY Materials Options Double glazed windows australian standard Profiles 1) 6063 T5 T6 grade of thermal break aluminum 2) 6063 T5 T6 grade of non thermal break aluminum 3) PVC UPVC Glass 1) double toughened glass with gap filled with air or argon gas 2) single toughened glass 3) double toughened glass will PVB laminate Elements: low e,tinted,reflective & obscure frosted to meet different U value and SHGC Hardware 1) Germany brand 2)