Private Property No Trespassing Sign, 3M Engineer Grade Prismatic .080 Reflective Outdoor Aluminum, 6" x 12" - By My Sign Center, A88-270RA Made in the USA. Pre-Drilled Holes for Post, Wall or Fence Mounting. Up To 7 Years Outdoors. Made Out of 3M Engineer Grade Prismatic .080 Reflective Aluminum. A Clear UV Polyester Over-Laminate Is Added to Give it Extra Protection with A Nice Glossy Look.