Description –These are manufactured using a propriety process of the UAAC.us company. The tag and quality of the letters are considerably higher quality than other sources found on ebay. The sign is 1.5in high and the letters are about 1in high. It is rot, wind, water, chemical, salt, proof. The coloring is embedded into the actual metal so it get scratched it does not loose its color. In addition the coloring (which is dark bronze) is 10 times hard then the actual metal itself so it almost can never wear out. Its also very light weight. Because we are an aluminum company and deal with high volumes of aluminum we have access to higher quality materials and more advanced fabrication technologies than others. It has very high contrast and can be seen in low light conditions. You can attach with double stick tape, foam tape, or drill and screws. (not provided)