509 509-REVLEN-17-BL - Replacement MPN: 509-REVLEN-17-BL The 509 Revolver Lens is offered in a wide array of weather-specific spare lens tints so you can enhance your vision to match any condition. Exclusive Pivot technology makes 10-second lens changes a reality, and the oversized spherical lens maximizes field of vision. Industry-leading optics provide the ultimate in anti-fog and anti-scratch performance coatings. Four vents around the lens perimeter add to the overall fog-eliminating performance. Premium anti-fog and anti-scratch coatings. Dual pane snow lens. Pivot lens technology with rotational lens action. Quick lens change system, 4 Vents for typical riding.