420 Stainless Steel construction, drilled for optimum performance and heat dispersion. Heavy duty construction on a single-piece design, each rotor is the proper thickness for the rear of heavy touring models. Performance rotor designed specifically for the rear of FLT Touring Bagger models. Enhances braking performance and the style of factory or aftermarket wheels. Rotor has a 11-4/5″ diameter and a thicker than standard 11/40″ thickness.