House Address Number Plaque Kit For Mailbox or Post, ReflectiveThe attractive address plaque is a pefect way for homeowners to add numbers to their mailbox or post with a bit of style. this oval shaped, two sided black plaque is made from rust proof polypropylene plastic treated with an ultraviolet inhibitor to extend its service life. the plaque can be mounted horizontally or vertically in a variety of positions. its highly visible reflective material makes identifying addresses quick and easy, even at night.