Shimano GRX RX815 Di2 Left Shifter Brake Lever 2x11 Speed model balance275 Campagnolo Super Record Record V2 EPS Campagnolo Super Record Record V2 EPS Interface Unit Compatible with 11 speed drivetrains SIL TEC surface treatment: SIL TEC is an advanced plating process that improves system performance through the use of imbedded flourine molecules while a recessed finger notch prevents upward slipping Anti slip texture and brake lever coating Higher brake lever axis and curved lever allow for higher braking efficiency to reduce fatigue on long rides Tooled reach adjust allows for lever to be adjusted to fit multiple hand sizes and riding preferences BR RX810 flat mount disc brake caliper offers greater multi surface brake control Caliper features Shimano ICE technology for excellent heat dissipation A raised hood head prevents hand misalignment and slippage