DURABLE ALUMINUM: 'Automatic Gate Warning' signs are made of 80 mil thick heavy-duty rustproof reflective and laminated aluminum that easily lasts 10 years outside and meets DOT road and traffic requirements. EASY INSTALLATION: All signs come with rounded, burr-free corners and 3/8 inch punched and pre-cleared holes. Signs mount to U-channel posts, square or round galvanized posts, wooden posts, and chain-link fences. 3M AUTHORIZED: Signs use official 3M Reflective Engineer Grade film and are printed with 3M screen printing or 3M outdoor digital inks designed specifically for outdoor traffic and property signs - providing ultimate quality and assurance. LAMINATED PROTECTION: With lamination, graphics are protected from weather and abuse to preserve a fresh look. Graffiti can be cleaned off too. Clear UV laminate resists chemicals, UV rays, water, and abrasion. PACK CONTENTS: One 24 x 18 inch red, black and white aluminum sign. Reflective Signs Are Hard to Ignore
Our aluminum signs have a reflective surface for extra visibility in dark and dim light conditions. Reflective surface means light thrown from headlights or flashlights will reflect back making the sign more readable.

3M Engineer Grade ["EG"] Reflective
3M Engineer Grade reflective signs are the most common material found on our public roads. 3M Engineer Grade signs have upto 7-year outdoor warranty.

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
3M Engineer Grade signs have a 7-year outdoor warranty, but most signs last much longer. Our 80 mil thick signs are laminated for enhanced performance. You can clean off graffiti and your graphics are protected. Unlike many other signs, our Caution - Automatic Gate Closes After Each Vehicle, Do Not Tailgate signs use industry-leading 3M inks and not off-brand or other low-durability inkjet pigments that fade in a year or two.