Item specifics:Condition:A brand-new， unused， unopened， undamaged itemModel: RD-TZ50MegaRange compatibleAdvanced light action designSIS shiftingSpeed: 6 and 7-speedGS with bolt versionWeight: 280gPackage included:1 X Shimano Tourney RD-TZ50 Bike Rear Derailleur GS 7/6-speed