When construction of buildings and other high-rise facilities are ongoing, be sure to mark the area with the "Falling Material" sign. This danger sign reminds employees and passersby to be wary of falling debris in the area. It comes in four material options: aluminum, fiberglass, adhesive vinyl, and plastic. These materials are made for indoor and outdoor use since they are resistant to harsh environmental factors such as weather, moisture, corrosion, and more. For quick and easy installation, this safety sign features pre-drilled mounting holes and rounded corners for aluminum, plastic, and fiberglass and an adhesive backing on adhesive vinyl. Danger sign Available in 4 material options 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"x20"