Hazard Class 4 Flammable Solid Worded Placards are required by 49 CFR 172.500 for highway, rail and water shipments of hazardous materials. Designed to meet DOT specifications for color and size, these 273mm x 273mm Flammable Solid Hazard Class 4 Placards may be used domestically as well as internationally. Our DOT placards are printed with durable UV inks that retard peeling, chipping and fading. Select from flammable solid placards, spontaneously combustible placards or dangerous when wet placards in a variety of styles and materials. Sold in packages of 25. Also sold in cases. Case quantity based on material.