Dont take chances when shipping flammable gas. Put Labelmasters UN 1950 Flammable Gas Placards to work. Pre-printed with the four-digit UN Number, these DOT placards are what you need for shipping Aerosols and meeting the requirements of 49 CFR 172.500 for domestic and international shipments of hazardous materials by highway, rail and water. They are printed on E-Z Removable Vinyl that can be removed with little or no residue remaining on the surface, and is perfect for both long-term and short-term shipping needs. These Hazard Class 2 placards 273 x 273mm and are sold in packs of 25 or cases of 900.