Brembo 09.9587.11 UV Coated Rear Disc Brake Rotor Environmentally friendly, solvent free UV coating offers superior protection of the disc, including braking plate surfaces; includes new intelligent marking location for immediate control of the minimum thickness Pillar Venting Technology improves cooling capacity and increases disc strength by over 40 percent Outside Diameter (mm) 302; Nominal TH (mm) 22