... insulation and heat insulation3)Environmental-friendly4)AutomaticA) Aluminium FrameMaterial: Aluminium alloy (6063/6061/6082/6060)Wall thickness: ... D-handle lock/in lock/handle lock and etc.Hinges: new-style, reinforced hinge, thickned, widened, reinforced ... adjustable, steady rotation bearing.Stainless steel accessories---hinges, locks, handles, screws, installation bolt and etc.Packing ...