EXTREMELY DURABLE: All our Equine safety products are made from commercial grade materials specifically rated for outdoor or indoor usage for years of maintenance free life in the harshest environments. Our signs will last as long as your business! SIZE & SPECS: 12" X 18" Aluminum (Rust Free) – Commercial grade Heavy Gauge Aluminum pre-finished white aluminum with (4) pre-drilled ¼” mounting holes and rounded corners. PROUDLY MADE IN THE U. S. A. : Buy with the confidence and pride that only comes from purchasing a SignMission product produced in our state-of-the-art facility in West Palm Beach, Florida. VIBRANT & VISIBLE: We use smart fonts and unrivaled inks and colors to ensure that our signs are visible inside and outside even in poor lighting and extreme weather. Our signs won't fade from the sun and are corrosion free for life. Products can be mounted on walls, doors, fences, barns, stables All letters at least 1" tall