Material: Aluminum Alloy + Ceramic.
2pcs Ceramic Pulley Aluminium Alloy Rear Derailleur Guide,Bicycle Jockey Wheel Roller Part Accessory For MTB Bike,Support 7/8/9/10 speed,Apply for Most of Rear Derailleur on the Market(red 11T)
Road Bike Ceramic Pulley Rear Derailleur 10-17T Guide MTB Bearing Jockey Wheel
Road Bike Ceramic Pulley Rear Derailleur 12T 14T Guide MTB Bearing Jockey Wheel
2pcs Ceramic Pulley Aluminium Alloy Rear Derailleur Guide Roller For MTB Bi GH
11T 13T Bike Ceramic Pulley Aluminum Alloy Rear Derailleur Bearing Jockey Wheel}
