AFFORDABLE, DURABLE & LONG LASTING Our flexible .024 gauge plastic polyethylene posted signs come in our stock yellow background with black print.  Signs printed on plastic will last a minimum of 7 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.