High-Quality Materials:Made of rugged, heavy-duty 40 mil thick rust-resistant reflective aluminum for long-term indoor and outdoor use with a long service life. Reflective action: They have good reflectivity when illuminated by lighting, ensuring they are clear and visible at night. Laminated Protection: Laminated for optimal UV, weather, scratch, waterproof, and fading resistance, withstands the elements and won't fade regardless of sunlight, rain, or other extreme weather. High visibility and information: The size of the sign is 10x7 inches, the color is easily recognizable, there is obvious bold large letters, which can be seen from all directions, warning that there is danger here, it is a chemical storage area, only authorized personnel can use this sign. Easy to install: Features pre-drilled mounting holes for easy installation. Can be easily and quickly installed on U-groove posts, square or round galvanized posts, wooden posts and link fences. This is a Danger - Chemical Storage Area, Authorized Personnel Only Sign，The sign measures 7" x 10" and this sign informs people that there is a hazard here, is a chemical storage area, and only authorized personnel use this sign warning. The quality is made of durable thick aluminum, waterproof and laminated, sturdy aluminum signs that withstand sun, rain and extreme weather conditions and will not fade, signs have pre-punched/pre-cleaned holes for installation, suitable for indoor, outdoor.