PN#708502  SKU#13934  8-1/2″ Offset Mount Convex Mirror. Three Screw Convex Mirror. Size: 8-1/2″ dia. Mount: Offset. Glass: Convex. View: Blind Spot. Radius of Curvature: 12.6″. Material/Color: Stainless Steel. Note: Offset Stud. Three screw ball stud offers secure mounting and easy adjustment. 12.6 radius Curvature Glass. Black gasket holds glass in place.