●M6100 Set Package Included:1 x Right Shifter Lever;1 x Rear Derailleur. ●Speed:12 speed;Suitable for mountain bike,city bike, hybrid bike. ●Deore SL-M6100 Right Shift Lever is designed for use with 12-Speed Deore M6100 MTB drivetrains. ●Deore M6100-SGS rear derailleurs deliver advanced shifting performance with decreased tension in the low gear position. ●Take it to enjoy a different riding experience.