Diamond grade reflective aluminum sign post, . Draw attention to your sign. Reflective post panels highlight your sign's message. This is a great add-on to your Stop signs. Red and white panels are reflective and use heavy-duty aluminum, for great visibility and durability. Signs mount flush onto your sign post, and protect your installation. Predrilled holes make for easy attachment to any sign post. Signs lasts 10+ years outdoor life. Great water and chemical resistance. Typical maximum temperature 168 degree F. Mounts with screws or clips. This is the brightest sign material produced by 3M, with three times the reflectivity of High Intensity and ten times the reflectivity of Engineer Grade signs. These signs combine the high daytime conspicuity with the high nighttime reflectivity and wide angle performance of 3M microprismatic lens technology. Signs carry the 3M warranty for traffic signs - signs are guaranteed to last at least 12 years outdoors - although in practice most Signs lasts even longer. Signs are printed with 3M screen printing or 3M outdoor digital inks designed specifically for outdoor traffic and parking signs - for the ultimate in durability. The base material for these signs is a 63 mil thick non-rusting aluminum. Signs have rounded corners - for easy handling and a professional appearance. Competitive signs often use a lower cost (and more hazardous) square corner. Signs have prepunched/precleared holes to insure a hassle-free installation. 63 mil thick signs outlast wind and abuse. Once installed, and unlike 40 mil aluminum signs, they are virtually impossible to bend. Measures 3-inches width by 30-inches height. Red/white color combination.