Concave anti-glare glass, these mirrors are the slightly lager Spy R Mirror, 80mm Diameter and sharp, providing a great view. This Mirror includes the Proguard LP200B Adapter, Which fits most bars with an inside diameter of 13-18mm. See attached chart for fitment, If you're unsure, feel free to ask! This Listing is for one mirror and adapter. Order 2 if you want a pair.