Caution Children At Play Signs - 12x18 Our Children At Play signs are constructed of rust-free, heavy gauge (.063), durable aluminum Our Children At Play signs are made using 3M Engineer Grade Reflective sheeting and 3M inks Our Children At Play signs are rated by 3M for at least 7 years no-fade service Our Children At Play signs have holes drilled at top and bottom center for easy mounting Our Children At Play Signs are manufactured to meet Federal MUTCD sign standards