Exit Only Parking Lot Sign - 24x18 Our Parking Lot Signs are constructed of rust-free, heavy gauge, durable aluminum Our Parking Lot Signs are made with 3M Engineer Grade Reflective sheeting and 3M inks Our Parking Lot Signs are rated by 3M for at least 7 years no-fade service Our Parking Lot Signs come with holes drilled at top and bottom center for easy mounting We manufacture our Parking Signs to National MUTCD standards