Using your Deltana 4 - inch Solid Brass Address Number 9 is easy. Just find a suitable spot on your home or business exterior, like next to the door or on a mailbox. Make sure the surface is clean and dry before installation. When it comes to maintenance, simply wipe it down with a soft, dry cloth regularly to keep its shine. Avoid using abrasive cleaners as they can scratch the brass finish. If it gets dirty, you can use a mild soap and water solution, then dry it thoroughly. This will help keep your address number looking great for years to come.