... Designer Door and Window Features:1)Air-proof, fire-proof, safe-proof and water-proof2)Sound insulation and heat insulation3)Environmental-friendly4)AutomaticA) Aluminium FrameMaterial: Aluminium alloy ... , reinforced adjustable, steady rotation bearing.Stainless steel accessories---hinges, locks, handles, screws, installation bolt and etc.Packing: Foam Paper+carton, Pearl cotton+carton ...