Reflective Signs Save Lives Reflective signs illuminate when struck by light from headlights or any other source. This makes the message readable even in dark and low lighting. When every second is important, reflective aluminum signs offer real help. 3M High Intensity [“HI”] Reflective 3M High Intensity reflective signs offer exceptional reflectance – especially when approached at an angle. USA’s Oldest Sign Manufacturer Family owned since 1918, we take immense pride in our signage. Being one of the oldest certainly means we know this business in and out. Our South Dakota factory is the oldest manufacturer of metal signs in the USA. We have been an integral part of safety and convenience our signs have provided over the years. Industry Leading Durability Size Correctly Find a wide range of sizes for our No Trespassing signs. Larger signs, of course, can be seen from a greater distance than smaller signs. And, a larger sign has much more impact. As a simple “rule of thumb”, 10” x 14” sign is best for a reading distance up to 20’; 12” x 18” signs are best for a reading distance of 40’; and, 18” x 24” are best for reading distances of 60’ (or more). In general, though, the time and cost of installing and ordering a sign is such that it often makes most economic sense to purchase the largest and more durable sign that fits. 3M AUTHORIZED. Official 3M reflective films and inks on durable, rustproof aluminum ensures that our signs meet all DOT requirements for outdoor parking and traffic signs. Hi Intensity Reflective Aluminum is 3x more reflective than Engineer Grade. ROUNDED CORNERS. Signs have rounded corners and burr-free corners for safe handling, longer life and a professional appearance. INSTALLATION. All signs come with pre-punched and pre-cleared mounting holes for easy installation. Signs mount to U-channel posts, square or round galvanized posts, wooden posts and chain link fences. LAMINATED. Graphics are protected from weather and abuse. Graffiti can be cleaned off. Laminated signs outlast competitive unlaminated or overcoated signs.