Protect areas to be enjoyed by all from overly enthusiastic bikers. Or, post in areas where bikes can become a nuisance when left behind. 12" x 18". Steel. Produced using a hot dip continuous process, bonderized, primed and epoxy coated on both sides. Final coat baked enamel. Same as US Federal Highway specifications - no skimping on quality for a sign that will last for years with vibrant graphics and wording. Colors, graphics and wording as shown. US MADE.