Need a caution sign for construction purposes? This "Construction Area" caution sign is a great choice! This safety sign is best used for indoors and outdoors, such as construction areas, as they have high resistance to weather and moisture. So when exposed to cold or dry conditions, this caution sign will still last long. This safety sign also comes in four hard-wearing materials that are suited for various needs. It's economical, too, so this safety sign won't hurt your pockets! This caution sign also comes with pre-drilled mountain holes and rounded corners to make posting easier. Caution sign Materials: aluminum, plastic, fiberglass, adhesive vinyl Aluminum: corrosion-proof and UV-resistant Plastic: moisture and weather-resistant Fiberglass: resistant to chemicals, weather, mold, mildew, stains Adhesive vinyl: weather, moisture, corrosion-resistant Indoor and outdoor use Pre-drilled mounting holes Radius corners Adhesive backing for adhesive vinyl Sizes: 3"x5" - 14" x 20"