Material: Aluminum,very durable.Size:16 x12 Inches,clear and easy to see.Weather resistant and fade resistantEasy to install and a solid overall sign.Bright colors and big enough to read from a distance.Perfect for street,road,driveway. High quality UV protected ink, which will ensure the graphics are protected from the sun and extreme weather and will not fade. Our signs are professionally designed, not only with eye-catching appearance, but also with reflective materials that will catch someone's eye in the dark. Signs have two 0.3 inches od corner holes.For walls:Affix with screws(not included).For posts:Affix with nuts&bolts(not included).For fence or gate:Affix with zip ties(not included). Slow Down Speed Limit 15 MPH Sign UV Printed,Professional Graphics Reflective Aluminum Easy to Mount