Comelit vandal resistant digital call video, BS316 stainless steel, vandal resistant , engravable , door entry intercom panel. The vandal resistant door entry panel with cut out for proximity reader, is suitable for external use and is flush fitting. Front plate is BS316 stainless steel, vandal resistant , 2.5mm thick (12g).BS316 marine grade stainless steel is tougher and more resistant to corrosion than other grades of stainless steel.Inside the panel every nut, bolt and screw is stainless steel for maximum corrosion protection (and even the back box is stainless steel). The panel can be laser engraved ENG to your requirements although this is not essential on single-button panels.