SmartParts 82208 8-Legend Flip Style Placard with 2 Clipped Corners Corrosion resistant hinges make changing panels simple Placards fully comply with DOT specifications for transporting hazardous materials Backplate constructed of corrosion resistant, formed aluminum with corners designed to direct away ice and road debris All panels built from aluminum alloy and coated with acrylic paint with rounded corners for safety Vibrant UV ink complies with DOT color standards and will not fade or chip