Features1Left Right Control: A pair of left and right bike brake levers, easy and portable function of V brake or mechanical disc brake. Optical gear indicator includes: left and right control and control. 2Speed Change: The bicycle transmission system changes the speed by changing the combination of the chain and different front and rear gear discs. 324 Speed: This aluminum alloy mountain bike left and right brake lever shifter is in the model of EF51 3x8 speed, applicable speed is 3, 9, 18, 24 speed. 4Ergonomic Design: EF51 3x8 speed bike shifter brake lever provides an ergonomically designed finger position and trigger style handle for more comfortable operation. 5Aluminum Alloy: Bike brake lever is made of aluminum alloy with exquisite black appearance, which is duable and high end at the same time.SpecificationItem Type: Bike Brake Lever ShifterMaterial: Aluminum alloy, plasticGross Weight: 400g / 14.1ozColor: BlackModel: EF51 24 speed dialPackage List1 x Left Brake Lever Shifter1 x RightBrake Lever Shifter