Lightweight 11T Mountain Bike Bicycle Rear Derailleur Pulley Guide Wheel (Black)

Features: 1. Aluminum alloy guide wheel body, lightweight, high strength, anti-rust and durable. 2. The steel bearing has good performance in rolling smoothly with great stability, low chance of getting chain stuck. 3. Compatible for most of rear derailleur on the market. 4. Fit for 4/5mm roller screw shaft with the screw shaft adapter. 5. A must-have replacement part for your bike. Specification: Material: Aluminum Alloy, Steel Optional Color: Black Red, Black Type: 11T Fit for most of rear derailleur on the market Size: Approx. 41.5mm/1.63in Weight: Approx.15g/0.53oz Packing List: 1 * Bike Rear Derailleur Pulley 2 * Screw Shaft Adapter Note:  One of the screw shaft adapter has been installed on the pulley.