Durable Aluminum Material: Made From Premium RustFree Aluminum For LongTerm Use Reflective Finish For Visibility: HighVisibility Reflective Coating Ensures Your Sign Is Easily Seen, Day Or Night. 4 Pre-Drilled Mounting Holes: Features Four Precision-Drilled Holes For Fast And Secure Installation On Doors, Walls, Or Fences. Commercial: Clean, Professional Appearance Ideal For Commercial Properties, And Job Sites. Perfect Size: Compact Yet Visible Dimensions Make It Suitable For Any Application 7X10 electrical main shut off sign size 7 inch x10 inch sign thickness 0.4mm sign letters color: white sign background color: red sign .sign material: aluminium. reflective sign. rust free