WHOA Stop Sign - 18x18 Our Property Management Signs are Constructed of rust-free aluminum Our Property Management Signs are made with 3M Engineer Grade Reflective sheeting and 3M inks Our Property Management Signs are rated by 3M for at least 7 years no-fade service Our Property Management Signs have holes drilled at top and bottom center for easy mounting Anti-Graffiti 3M 1150 Protective Overlay Film included at NO extra charge