SmartSign 3M Diamond Grade Reflective Aluminum Sign, Legend "Security Notice - Video Surveillance" with Graphic, 18" square, Black/Yellow on White Legend "SECURITY NOTICE THIS PROPERTY IS PROTECTED BY VIDEO SURVEILLANCE" 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