National Cycle N20403 VStream 14in. Standard Clear Windscreen for 1996-2011 Har VStream windshields from National Cycle are effective in reducing wind turbulence, buffering and noise 4.5mm polycarbonate for outstanding impact strength 20X greater than acrylic Quantum hardcoating provides unbeatable scratch resistance Covered by National Cycles 3-Year Manufacturers Warranty against breakage! 40% thicker than stock high quality at a great value