The split aluminum thumb bike accessory speed controller is a must-have for any serious cyclist. Featuring a split thumb with cable and an aluminum flat , it offers exceptional durability and precision. This is ideal for mountain biking, road cycling, and everyday use, ensuring you can easily adjust gears to match your riding conditions. Its installation process makes it an for enhancing your bike's performance. Features -Color:Multi -Material:Aluminum -Size:10.80X5.00X3.50cm/4.24X1.97X1.38in -Ergonomic grip: this split aluminum is designed with ergonomics in mind, providing a comfortable grip that reduces strain on your hands. -Easy to install: the split design makes this easy to install and adjust, making it a practical choice for any cyclist. -Flexible and responsive: with its cable operation, this offers flexible and responsive control, enhancing your overall riding experience. -Lightweight aluminum build: constructed from lightweight aluminum, this is easy to control and does not add unnecessary weight to your bike. -Precise speed control: the speed controller provides precise speed adjustments, allowing you to finetune your bike's performance for optimal riding conditions Package list: 1 pair x bicycle shifters