Dakota 4.5 Windshield National Cycle A low cost alternative to a hardcoated polycarbonate windshield is a windshield made from high Impact acrylic. Dakota 4.5 is named for its material thickness at 3/16” (4.5mm.) This is a heavy gauge windshield. Dakota 4.5 uses the same mount kit as the narrow frame Heavy Duty windshield. For that custom look, at a very affordable price, nothing beats the Dakota 4.5. Height 18.25” Width 24”