... 1)Air-proof ,fire-proof ,safe-proof and water-proof2)Sound insulation and heat insulation3)Environmentally-friendly4)Space-savingA) Aluminium FrameMaterial ... security lock;D-handle lock/in lock/handle lock and etc.Hinges: new-style,reinforced hinge,thickned,widened, ... .Stainless steel accessories—hinges,locks,handles,screws,installation bolt and etc. Packing: Foam Paper+carton , pearl cotton+carton ...