Ordering Unit: 1/EA7" X 10" Self-Adhesive Safety "DANGER FLAMMABLE GAS" sign communicates critical messages that inform of designated areas and important safety precautions. The sign is made from high-quality, recycled polystyrene with UV-resistant inks. UL Validated for recycled content which substantiates material compliance with various green codes, standards, and procurement policies. Signs can be applied directly to doors, walls or the outside of windows.