Exercise the necessary precautions when shipping non-flammable gas. Put Labelmaster's Non-Flammable Gas Blank Placards to work. Ample space is provided for you to include the UN Number, and these DOT placards meet the requirements of 49 CFR 172.500 for domestic and international shipments of hazardous materials by highway, rail and water. Using UV inks that retard peeling, chipping and fading, they are printed on non-adhesive polycoated tagboard, which offers exceptional resistance to buckling and blowouts in all weather conditions. These Hazard Class 2 placards measure 273 x 273mm and are sold in packs of 25.