15-in. NFPA 704 hazard diamond sign has bold colors and 2-4-1-0 hazard rating Sturdy enamel-coated aluminum with clear protective laminate Corners have 0.20-in. mounting holes for easy installation Resists UV, chemicals, abrasion and moisture. Use indoors or out Made to order in the USA This NFPA 2-4-1-0 chemical hazard sign is manufactured with four 0.20-inch mounting holes for easy installation. It is printed with bold colors on a white background to make your NFPA hazard rating clear to emergency responders. This sign is UV, chemical, abrasion and moisture resistant and is suitable for use at temperatures from -40 to +176 F. ComplianceSigns.comsigns and labels are made in the USA and commonly used in industrial, commercial, public and private settings.