Advanced, proprietary Ceramic organic compound and thermal coating containing graphene for unmatched performance and control without added noiseUnique finned backplate offers more airflow and more surface area to greatly reduce thermal properties and heat buildupNo toxic copper dust or heavy metals are used in the braking compound47Hylex Flat Mount, Shimano Ultegra RS805, RS505, RS305, RS405, R7000, R8000, R9000GrapheneOrganic/CeramicBlackAbsoluteBlack