This is for the HS400-450-500 Vector UTV that has the Front Vertical Frame Rails of 46 1/2" (Center to Center) wide. Early 400 Models had 47 1/2" and this newer model Vector 400-450-500 Windshield is 1" narrower. This has 6 Quick Release Clamps. If you need more Air Flow remove the bottom 1/3 section or just the upper. This is a Tight and Clear Polycarbonate not like the early model that was made from the cheaper Plexiglass.