This 12" x 18" custom Caution aluminum sign is built to handle the outdoors and last for many years. The reliable, heavy-duty material is a .063 rust-free aluminum made in the USA. Reinforce the safety protocol in your business or work area as you create up to 3 lines of text to display on the sign. By posting a clearly written, attention-getting message, you can help prevent hazards and protect pedestrians, workers and customers.