The AS4/AS5 windshield meets US D.O.T requirements. Most Street Legal” requirements specify the AS4/AS5 windshield. This windshield will have a certification stamp in the lower left corner. These windshields are only available in flat one-piece configurations. This windshield is made of polycarbonate with a nominal thickness of 0.177-inches. All mounting hardware is provided in the false bottom of the box. This windshield will be packaged individually for damage-free shipping with a protective film applied to both sides. This is a high-quality windshield made in America since 1993. You may also want to consider wind blockers and air dams to help effectively eliminate the wind drafts from above the windshield. This is a quality RedDot Product.