Slow Down with Image of School Children Warning Signs - 18X18 Diamond Our School Signs constructed of rust-free, heavy gauge (.063), durable aluminum Our School Only Signs made with 3M Engineer Grade Reflective sheeting and 3M inks Our School Signs rated by 3M for at least 7 years no-fade service Our School Signs have holes drilled at top and bottom center for easy mounting Our School Signs are manufactured in the USA to meet Federal MUTCD standards