K2760 Invisible Hidden Bear 60kg 36mm Door Thickness 3D 180 Degree Adjustable Concealed Iron Materials Wooden Swing Door Hinge

K2760 Invisible Hidden Bear 60kg 36mm Door Thickness 3D 180 Degree Adjustable Concealed Iron Materials Wooden Swing Door Hinge. Koblenz hinge. invisible hinge. Iron materials hinge.