SmartSign Plastic Sign, Legend "Emergency Exit Alarm Sounds if Door is Opened", 10" high x 14" wide, Red on White Durable plastic. Signs use 55 mil thick hdpe (high density polyethylene). all signs come with rounded corners and pre-cleared holes. Signs have a 100 percent recyclable base material Laminated. To achieve maximum durability, sign graphics are digitally printed and protected with a laminate. This provides enhanced weather and graffiti resistance Installation. Signs mount to walls and chain link fences and can be used indoors or outdoors