National Cycle Vstream WindscreenWindscreen: VStreamMaterial: Lexan PolycarbonateMaterial Finish: Quantum HardcoatedColor: ClearThickness: 4.5mmRequired Mount Type: Stock Mount PointsDimensions: Height: 24.10" (61.3cm) Width: 21.00" (53.3cm) Measured vertically from the bottom center edge to the top of the screen, and horizontally across the back at the widest point.* Actual Contents May Vary From Photo* Uses OEM HardwareCOMFORT - OPTICS - STRENGTHConcours owner's appreciate the patented "V" shape and advanced dimensional contours that push the wind vortex away from the rider's head, resulting in a peaceful, quiet riding environment. The passenger's comfort is improved as well.Lexan polycarbonate is used for outstanding optics and impact strength 23X better than acrylic. Then we add National Cycle's exclusive Quantum hardcoat for scratch resistance 10X better than FMR coating and 30X better than acrylic replacement screens. This is one tough windscreen!Reduced wind noise... less turbulence... superior strength... perfect style. The VStream revolution is here!