V-Brake ST-EF51 Set 3x7 Speed Shifter Brake Lever Combo MTB Bicycle Bike 21 Speed BrakeShift Lever with Brake Cable

Product Features: 21-speed transmission,ergonomic design of position and trigger handle. Make wider gear display vision, just take a glance at speed changes. Easier operation, lower division. Specifications: Condition: 100% Brand New Compatible for: Front 3 gear, Rear 7 flywheel and 21 speed positioning transmission system Scope of application: 21-23mm diameter handle bar Color: Black Package includes: 2pcs Transmission (Left 3 speed / right 7 speed) 2pcs Brake line