Squad-Fitters, Inc. carry National Cycle replacement windshields for a variety of bikes. The Road King shield features thick 4.0mm polycarbonate construction for unmatched impact and crack resistance. Combined with exclusive Quantum Hardcoating, (boosting the scratch resistance to 30x greater than acrylic/Lucite plastic). Also available is the ST1300 VStream windshield. The advanced 'V' shape and dimensional contours push the wind vortex out and away from the riders' helmet, resulting in a peaceful, quiet environment. Six millimeter Quantum coated Lexan polycarbonate construction greatly reduces wind noise and turbulence, while providing a clear view.