... box(G.I box,metal outlet box)galvanized sheet with earth screw,adjustable ear and brass grounding.◊ BS Metal junction box( ... box,metal outlet box)◊ 73mm*73mm*16mm,galvanized sheet,with earth screw ,with adjustable ear,with brass grounding stud ◊ Galvanized sheet, ... with earth screw ,adjustable ear and brass grounding stud.◊ The thickness of ...