The GRX ST-RX400 10-speed hydraulic disc/brake lever provides greater control on mixed terrain.Features-Gravel inspired Dual Control shift/brake lever and bracket ergonomics-Anti-slip brake lever-Same light shifting operation as top tier systems-Tooled reach adjust allows for lever to be adjusted to fit multiple hand sizes and riding preferencesItem Specifications-Brake Lever Use:Left-Color:Black-Defined Color:Black-Front Der/Shifter Compatibility: Road-Drivetrain Speeds:10-Rear Der/Shifter Compatibility: Road-Adjustable Reach:Yes-Hydraulic Fluid Type:Mineral Oil