National Cycle N20401 VStream 17in. Tall Clear Windscreen for 1996-2011 Harley Davidson FLH Models 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