Features:Brand new and high qualityBike Cycling Aluminium Jockey Wheel Rear Derailleur Pulley 11TTeeth: 11TBearings: Upgraded RS bearing.Design for outdoor BikeSpecifications:Type: 11 Gear Guide Pulley Color: Black, White, Blue, Red, Yellow, PurpleMaterial: AluminiumSize: 4mm-5mm (D)Net Weight: 9.8gPackage Includes:1 x Wheel Rear Derailleur Pulley (11T)