Features: Used on rear derailleur for chain transportation and speed changing. 11T suits for 8/9/10/11 speed rear derailleur. Inner ceramic bearing is ultralight and owns high degree of lubrication, which can ensures its smooth working. Aluminum alloy construction is anti-rust and corrosion resistance, durable for long time use. 2 replaceable 4mm and 5mm bushing is included to enrich your installation choices. A necessary accessary for your bicycle. Specification: Condition: 100% Brand New Material: Ceramic Bearing + Aluminum Alloy Color: Red, Gold, Blue, Titanium Color, Black(Optional) Teeth: 11T Hole Diameter: Approx. 6mm / 0.24in(4mm and 5mm bushings are included) Size: Approx. 4 x 0.8cm / 1.6 x 0.3in Weight: Approx. 18g Packing List: 1 x Bike Rear Derailleur Pulley 2 x Bushings(4mm and 5mm) Note: Please allow slight size inaccuracy due to manual measurement and we appreciate for your understanding.

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