SmartSign 3M Diamond Grade Reflective Aluminum Sign, Legend "Caution: Speed Bumps Ahead", 18" high x 12" wide, Black on Yellow Legend "CAUTION SPEED BUMPS AHEAD" Lyle signs supplies your sign with radius corners for safety; holes punched for post mounting Lyle Ultimate signs have a 12 year durability Lyle Signs produces signs that exceed industry standards and specifications The temperature range is -40 to 175 degrees F