Size:31.8mm Batteries included?:No Features: 1. Made of high quality aluminium alloy, which is anti-rust, sturdy and durable. 2. Can be tightly clamped on the front derailleur, uneasy to slide. 3. Easy and convenient to install and remove. 4. Suitable for braze-on front derailleur. 5. 2 sizes are available, perfect accessory for bike. Specifications: Condition: 100% Brand New Item Type: Bike Accessory Material: Aluminium Alloy Color: Black Inner Diameter: 31.8mm / 1.25inch, 34.9mm / 1.37inch(Optional) Weight: Approx. 20g Package Include: 1 x front derailleur clamp [Uneasy to Slide]: This front derailleur clamp can be tightly clamped on the front derailleur, uneasy to slide [Easy to Use]: The cable clamp of the chain shifter is easy to install and disassemble, suitable for brazing of the front chain shifter [High Quality Material]: Front derailleur clamp is made of high quality aluminium alloy, which is anti-rust, sturdy and durable [Two Sizes]: There are 2 sizes are available, perfect accessory for bike.Inner Diameter: 31.8mm / 1.25inch, 34.9mm / 1.37inch(Optional) [100% Absolutely Satisfactory Guarantee]: If you have any problems or suggestions about this product, please feel free to contact us by email; We will surely give you a satisfactory solution and never let you suffer losses [Uneasy to Slide]: This front derailleur clamp can be tightly clamped on the front derailleur, uneasy to slide [Easy to Use]: The cable clamp of the chain shifter is easy to install and disassemble, suitable for brazing of the front chain shifter [High Quality Material]: Front derailleur clamp is made of high quality aluminium alloy, which is anti-rust, sturdy and durable [Two Sizes]: There are 2 sizes are available, perfect accessory for bike.Inner Diameter: 31.8mm / 1.25inch, 34.9mm / 1.37inch(Optional) [100% Absolutely Satisfactory Guarantee]: If you have any problems or suggestions about this product, please feel free to contact us by email; We will surely give you a satisfactory solution and never let you suffer losses