PN#708508  SKU#13946  7-1/2″ Center Mount Convex Mirror. Three Screw Convex Mirror. Size: 7-1/2″ dia. Mount: Center. Glass: Convex. View: Blind Spot. Radius of Curvature: 12.6″. Material/Color: Stainless Steel. Note: Center Stud. Three screw ball stud offers secure mounting and easy adjustment. 12.6 radius Curvature Glass. Black gasket holds glass in place.