Placards identify special hazards in transport vehicles and large containers. ACCUFORM SIGNS 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. Adhesive Vinyl placards feature a 4-mil thick printed matte surface, moisture-resistance, and scored backing for quick peel-off and application.