1.[3 x 7 Speed]The bike shifters are marked with 3 speed or 7 speed. The left gear shifter for 3 speed and the right shifter for 7 speed. Featuring two shift levers, one lever for down-shifts and one level for up-shifts. Shifters come with cables. 2.[Combination design]The shifters and brakes are one unit. Takes up less space on the handlebars. Very easy to install. Tip: it is easier to install brakes by leaving the old brake cables in place. Simply unscrew the adjust screw on the old brake handle and the wire will come out. Then insert the wire into the brake handle 3.[Parameter]Transmission cable length Front: 1800mm, rear: 2050mm, Brake cable length front: 750mm, rear: 1700mm, This Bicycle Shifter Suitable for 22.2mm diameter handlebar bicycle. 4.[Gear view window design]All shifter come with intuitive gear display to view the gears clearly and quickly, The shift handle provides an ergonomically designed finger position for more comfortable operation.It can be adjusted to your own needs within reach.