AFFORDABLE, DURABLE & LONG LASTING Our flexible .012 gauge aluminum posted signs come in our stock orange background with black print. Aluminum is our most durable material and signs printed on aluminum will last a minimum of 15 years outdoors. Backer boards may be necessary on narrow trees or posts. Custom colors are available. To Imprint Name & Address on signs, Please Call 800-473-0698 *OK to mix and match for quantity price breaks.