Dont take chances when shipping flammable gas. Put Labelmasters 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 E-Z Removable Vinyl that is perfect for both long-term and short-term shipping needs and can be removed with little or no residue remaining on the surface. These Hazard Class 2 placards measure 273 x 273mm and are sold in packs of 25 or cases of 900.