NMC OSHA signs are the perfect way to alert your employees and guests when a hazard is present in your facility. Keep your facility safe with an OSHA regulated sign. It prevents an accident. These OSHA signs comply with OSHA 29 CFR 1910.145. 0.040 aluminum has baked enamel finish on both sides. This allows your sign to be printed on both sides. It is weatherproof and non-corrosive. Measures 10-inches length by 7-inches height. Indoor/outdoor use. Good chemical resistance. Maximum temperature: 150 degrees F. Mounting: yes. Header "DANGER" and legend "DO NOT ENTER AUTHORIZED PERSONNEL ONLY".