DEAD END - 24" wide x 24" high HIP High Intensity Prismatic reflecting caution diamond aluminum sign with black text on a yellow background. This aluminum sign measures 24" wide x 24" high x .080" in thickness with mounting holes centered at top and bottom for an easy installation. This sign is made right here in the USA. The D.O.T. approved reflectivity of this sign has a life expectancy of 7 to 10 years. PLEASE NOTE: Any critical sign used by the public, whether on private property or not, must have a minimum reflectivity of HIP, or High Intensity Prismatic sheeting, which this sign has. HIP sheeting can be seen from approx 1,000 feet away.