Feature 13 Gear Speed Transmission: This rear derailleur could achieve 6 7 8 speed transmission 2Better Control: This rear derailleur, with its unique design, combines specially positioned tooth profile and shift ramp to improve chain control during shifting. 3Precise Changing: The guide pulley controls the trajectory of the teeth from front to back to optimize each change, this perfect monitoring helps to achieve the most accurate changes. 4Aluminum Material: Made of excellent aluminum material, this rear derailleur is highly sturdy and stable, not easy to damage. 5Easy Installation: This is a perfect substitute for your old worn or damaged rear derailleur, which is precisely made, accurate in size, easy to install.Item Type: Rear DerailleurMaterial: AluminumSize: Approx. 16x10x6cm/6.3x3.9x2.4inApplication: TY300 rear derailleur 6 7 8 speed transmission .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Rear Derailleur