Highway Traffic Supply is a leading manufacturer of traffic signs in the USA for over 30 years. This Highway Traffic Supply Standard sign is manufactured using 3M High Intensity Grade Prismatic sheeting. The reflective sheeting meets ASTM D 4956 Type I. This sign is designed to last up to 10 years for indoor or outdoor applications. All Highway Traffic Supply signs are made with radius corners for safety and have pre-drilled holes for easy installation. This sign is made using 63 mil thick treated aluminum that resists corrosion and rust. Highway Traffic Supply has more than 10,000 stock legends available to you in various sizes, colors and materials. This sign Measures 18 inches in hieght and 12″ in width. This Highway Traffic Supply sign is intended to control traffic in a parking lot, on private property or on the roadway.