brand new and high quality Features: This type of ring is used for front derailleur,which convert 34.9mm to 31.8mm. If you desire to refit your front derailleur,this adapter ring will help you a lot. Suitable for majority of front derailleur. Specification: Material: Plastic Type: Front derailleur Color: Black Size: One Size Diameter: 31.8mm(1.25in) Quantity: 1 Pc(1 pc of ring only,other accessories demo in the picture are not included!) Note:1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes(without retail package): 1 x Ring