Placards identify special hazards in transport vehicles and large containers. Accuform DOT Placards meet the requirements for material, appearance, size, color, and character height, as specified by DOT 49 CFR 172.519, 521-560. These popular, ready-to-go 4-Digit DOT Placards are printed with the combination of hazard classification, hazard division, 4-digit identification number, and UN chemical identification number. Plastic placards are semi-flexible, and appropriate for short-term outdoor use. They also feature good impact resistance and UV inhibitors.