Exercise the necessary precautions when shipping non-flammable gas. Put Labelmaster's Non-Flammable Gas Worded Placards to work. 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, 20-mil rigid vinyl that is perfect for repeated usage in Slidemaster holders, multiple trips and in harsh weather conditions. These Hazard Class 2 placards measure 273 x 273mm and are sold in packs of 25 or cases of 500.