Feature: 1. Easy to operate, bicycle gears can be installed and removed quickly, convenient and practical. 2. Gear shifting, easy adjustment, finetuning the brakes, the lines are tight and not slippery. 3. Adopt new aluminum alloy and plastic material, lightweight design, durable. Aluminum alloy and plastic mountain bike handle, lengthened handle, flexible use. 4. About 3x9 27 speed handle, 3 speed for left hand, 9 speed for right hand. General assembly handlebar caliber 22.2mm, high adaptability. 5. The cost performance is quite outstanding, is the pursuit of cost?effective cyclists a good choice, stable bicycle speed quality. Specification: Item Type: Bicycle Shift Brake Material: Aluminum Alloy + Plastic Weight: Approx.272g9.6oz Lefthand Dial 3speed Size: Approx. 130x77mm5.1x3.0in Applicable Installation Diameter: Approx. 22.2mm0.9in Product Process: Electrophoresis Process Product Application: Mountain Bike Features: Responsive Braking and Gear Shifting, Fast Braking, Improving Riding Safety.. Package List: 1 x Left Shift Brake1 x Right Shift Brake Easy to operate, bicycle gears can be installed and removed quickly, convenient and practical. Gear shifting, easy adjustment, finetuning the brakes, the lines are tight and not slippery. Adopt new aluminum alloy and plastic material, lightweight design, durable. Aluminum alloy and plastic mountain bike handle, lengthened handle, flexible use. About 3x9 27 speed handle, 3 speed for left hand, 9 speed for right hand. General assembly handlebar caliber 22.2mm, high adaptability. The cost performance is quite outstanding, is the pursuit of cost?effective cyclists a good choice, stable bicycle speed quality.