All signs are made of heavy-duty .080 reflective aluminum (EG). Visable for day or nighttime use. They comply with most MUTCD and Federal ADA requirements. ALWAY CHECK WITH STATE AND/OR LOCAL AUTHORITIES FOR PROPER COMPLIANCE. Professional-grade screen printed for years of lasting durability. Pre-drilled holes for easy installation. All our Traffic Signs, Parking Signs, Parking Lot Signs and No Parking Signs feature rounded corners and are rustproof.