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Reflective Post Panels Are Hard to Ignore Easy to spot by day, and reflective at night, this Striped Reflective Post Panel adds emphasis to your sign and decreases accidents. 3M Diamond Grade [“DG”] Reflective 3M Diamond Grade Fluorescent Yellow post panels offer the brightest reflectance. These offer three times the reflectivity of High Intensity and ten times the reflectivity of Engineer Grade reflective signs. Fluorescent post panels and delineators are exceptionally conspicuous and make your signs hard to miss. Panels combine the high daytime and twilight conspicuity of fluorescent colors with the high nighttime reflectivity and wide angle performance of 3M microprismatic lens technology. This makes the panel uniquely conspicuous at the most dangerous times of the day (at dawn and at early evening times). 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 and panels have provided over the years. Industry Leading Durability