notice speed checked by radar aluminum composite outdoor sign 8.5" x10" work house signs sign made of aluminum composite industrial grade materials: professional grade vinyl graphics with long-lasting over laminate & heavy duty substrates made to withstand the harshest elements. indoor or outdoor use: made to withstand water rain uv rays signs have rounded corners: no sharp corners aluminum composite substrates will not rust. don't be fooled by cheap imitation plastic signs made in the usa