GRX ST-RX815 Di2 Shifter/Hydraulic Brake LeverBR-RX810 flat mount disc brake caliper offers greater multi-surface brake controlCaliper features Shimano ICE technology for excellent heat dissipationConvenient tool access and One Way Bleed system mean set up and maintenance are simpleA raised hood head prevents hand misalignment and slippage, while a recessed finger notch prevents upward slippingAnti-slip texture and brake lever coatingHigher brake lever axis and curved lever allow for higher braking efficiency to reduce fatigue on long ridesTooled reach adjust allows for lever to be adjusted to fit multiple hand sizes and riding preferencesItem SpecificationsAdjustable Contact PointNoAdjustable ReachYesBrake Caliper MountFlat MountBrake Lever UseRightColorBlackDefined ColorBlackDrivetrain Speeds11Front Der/Shifter CompatibilityShimano Road Di2Hydraulic Fluid TypeMineral OilHydraulic Hose Length1700Pad CompoundResinRear Der/Shifter CompatibilityShimano Road Di2Rotor IncludedNoWeight414 Shimano GRX ST-RX815 Di2 Hydraulic Brake/Shift Lever, Drop Bar UPC: 192790448930