Flammable Gas.
.Aluminum No Smoking Danger Sign, 10" H, 14 in W, Horizontal Rectangle, English, LCU4-0126-NA_14X10 No Smoking Or Open Flames., Sign Legend Background Color White, Sign Legend Style Symbol and Text Aluminum No Smoking Danger Sign, Horizontal Rectangle, Number of Printed Sides 1, English, Sign Format ANSI/OSHA Format, Sign Legend Hydrogen.