The Open Trail half windshield is made with ultra durable 0.177″ Makrolon? Polycarbonate for long lasting, high strength protection and a clear view of the trail. This half windshield is 11″ tall. The windshield has a seal at the bottom that rests against your vehicle. It is attached to your roll bars using four galvanized steel, rubber coated P clamps that are bolted to the windshield through pre-drilled holes.