Constructed of durable, lightweight, 4 mm, corrugated vinyl for extra rigidity, these Yard Signs are designed for prolonged outdoor use. Imprinted with high-quality, waterproof ink to resist fading, the optional fixed-metal rods firmly anchor the signs to the ground and are available in a variety of sizes and applications to provide even more durability. You can even piggyback a smaller sign atop a larger one to promote a special event or enticement. Optional grommets available.