made of .050 polystyrene plastic for long lasting durability. Label fire extinguisher usage for specific fire hazards and helps note which types of fires to use extinguisher with. For indoor and outdoor applications. Fire safety labels comply with nfpa standard #10. Accepted by underwriters laboratories osha 1910.157. Includes radius corners and predrilled corner mounting holes for easy installation. Size is 12in h x 9in w .