My Security Signs heavy duty aluminum security sign, legend "Dogs Contained By Invisible Fence". Keep neighbors and street walkers safe and happy with this dogs contained by invisible fence sign. This rugged sign are made from heavy duty, 63 mil thick aluminum. Unlike steel sign, our aluminum sign do not rust. Sign are printed with 3M screen printing or 3M outdoor digital inks designed specifically for outdoor traffic and parking sign for the ultimate in durability. They should last up to 15 years outside. Sign have rounded, burr-free corners, for longer life and a professional appearance. Compare with lower costs sign that use a lower cost and often hazardous square corner. Thick 63 mil sign do not bend. They have been proven to outlast the toughest of storms. Sign have large holes for easy mounting. The holes are cleared. Typical maximum temperature 168 degree F. Measures 12-inches width by 6-inches height. Blue on white color combination.