Smooth & Precise 21-Speed Shifting with a 3x7 bike shifter brake lever set, featuring left 3-speed and right 7-speed thumb shifters for fast and reliable performance. Aluminum Alloy Construction ensures yet strong design, providing long-lasting use and stable performance in tough riding conditions. Clear Gear Indicator allows riders to easily identify gear positions, enhancing control and improving the overall cycling experience. Wide Compatibility makes it ideal for mountain bikes, road bikes, folding bikes, city bikes, and youth bikes, serving as a practical upgrade for worn-out gear shifters. This 21-speed shifter brake lever set is designed for types of bicycles, ensuring smooth and precise shifting. The aluminum alloy construction guarantees , while the clear gear indicator enhances user experience. Perfect for upgrading your bike's performance and safety, this set is a reliable choice for any cycling enthusiast. Color: Black Material: plastic Package Contents: 1 pair Cycling Disc Handle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.