ST-EF51 Set 3x7 Speed Shifter Brake Lever Combo 21 Speed Shifter Set and Brake Levers for Mountain Bike

Tips: We offer 3-month hassle free replacement guarantee. If you ever have any issues, simply contact us for a free replacement or refund. We support 24 hours online customer service. 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