Feature: Shifter is necessary for bicycle,and a great shifter will bring you a absolutely smooth cycling experience. This shifter is including two shifter and a connecting wire. Suitable for all kinds of bicycle,which contains 15/18/21 speed. Wonderful shifter for you if you desire to own a fantastic cycling. Specification: Material: Plastic,Steel Application: Speed 15/18/21 Color: Black Size: Size Package includes: 1 Pair * Shifter(with cable) Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Made from high-quality materials, our outdoor sports products are durable and affordable to meet your daily needs. Please check the product size and model before placing an order to ensure it is the product you need. When you encounter a problem, please contact us and we will help until the problem is perfectly solved. When you receive your product, whether you are satisfied or not, we want to hear your opinion. Every customer can enjoy free refund or exchange service for damaged/quality problem products.