Play it safe when transporting potentially dangerous liquids with Labelmaster's Two-Sided 4-Digit Placards. These include UN 1993 Flammable Liquid markings on one side and UN 1993 Combustible Liquid on the other. The DOT placards meet the requirements of 49 CFR 172.500 for domestic and international shipments of hazardous materials by highway, rail and water. They are printed on non-adhesive, 20-mil rigid vinyl that is perfect for multiple trips and in harsh weather conditions. These Hazard Class 3 placards measure 273 x 273mm and are sold in packs of 25 or cases of 500.