Shimano 1 Pair 3 x 7 21Speed MTB Bicycle Bike Left Right Brake Lever Shifter V-Brake Combo Specifications: It works perfectly for optimum performance and maximum safety. High quality made, durable and easy to install. Suitable for mountain bike, road bike, etc.. Item Name: Bike Shifter Material: ABS + Metal Features: Durable, Easy to Install, Bike Accessories Length: 18cm/7.09", Width: 13cm/5.12", Height: 5cm/1.97" (Approx.)