CNC Aluminium Alloy Bike Ceramic Bearing Guide Wheel Rear Derailleur Pulley for Mountain Bicyclered 11T

Feature: 1. With ceramic bearing, lightweight, high lubricity, good performance. 2. Made of quality material, high strength, sturdy and durable. 3. Suitable for 8, 9, 10, 11 speed transmission system. 4. Wonderful accessory for mountain bike. 5. 2 different types for you to choose, meet your different needs. Specification: Condition: 100percent Brand New Item Type: Bike Derailleur Pulley Material: aluminium alloy + ceramic bearing Color: red Fitment: Fit for 4mm, 5mm, 6mm screw hole diameterSuitable for 8, 9, 10, 11 speed transmission system.Optional: 11T, 13T . Package List: 2 x Reduction sleeve 1 x Bike Derailleur Pulley2 x Locking cap