The Ultra Reflective Numbers by Grainger are a set of 10 high-visibility numbers that are ideal for warehouses, storage areas, and other industrial environments. They are made of a durable plastic material with a reflective coating that makes them easy to see, even in low light conditions. The numbers measure 4 inches tall and are available in black with silver reflective coating. They can be adhered to shelves, bins, and other surfaces using the peel-and-stick adhesive backing. This set includes numbers 0 through 9. The reflective property improves visibility and safety.