For Front Triple & Double chainring Applications Light and responsive front shifting improves efficiency and control OPTICAL GEAR DISPLAY for easy visible gear position Clamp band type only Each Item sold Individualy, if Looking for a Set Purchase 1 Left and 1 Right SL-M3100-L The SHIMANO ALIVIO SL-M3100-L shifting lever provides quick lever access and light and responsive shifting for 3x9-speed mountain bike drivetrains. The RAPIDFIRE PLUS lever features 2-WAY RELEASE, which allows for relief shifts by either pull of the index finger or push of the thumb. SL-M3100-R The SHIMANO ALIVIO SL-M3100-R shifting lever provides quick lever access and light and responsive shifting for 3x9-speed mountain bike drivetrains. The RAPIDFIRE PLUS lever features 2-WAY RELEASE, which allows for relief shifts by either pull of the index finger or push of the thumb. SL-M3100-2L The SHIMANO ALIVIO SL-M3100-2L shifting lever provides quick lever access and light and responsive shifting for 2x9-speed mountain bike drivetrains. The RAPIDFIRE PLUS MONO lever features 2-WAY RELEASE, which allows for relief shifts by either pull of the index finger or push of the thumb. Includes Left Shifters - 1800mm inner cable Right Shifters - 2050mm inner cable