National Cycle VStream Special Edition Windshield Honda Goldwing 1800 Special Edition model features 6mm Quantum hardcoated polycarbonate that is treated with RainZip. RainZip is a hydrophobic treatment that will increase water beading characteristics. Quantum hardcoating offers 20x greater impact resistance and 30x better scratch resistance than the OEM windshield and Acrylic shields. Features: Comes with the vent pre-installed for an easy installation As a finishing touch, you will notice the gold flake detail at the bottom of the screen Retains all adjustability of the stock windshield Backed by a 3-year unbreakable warranty Dimensions: Height: 22.00 (55.9cm) Width: 26.00 (66.0cm