Aluminum Alloy Sealed Bearing Jockey Wheel 11T Bike Rear Derailleur Pulley Roller Idler Bearing for 7/8/9/10/11 Speed

High-concerned chemical : None Model Number : Ceramic Bearing Jockey Wheel Material : aluminum Gear Teeth : 11T Freewheel Speed : 1 Origin : Mainland China Packing List: : 1x Ceramic Bearing Jockey Wheel Suit: : For Shimano,for MTB Road Bike Specification: : 11T Material: : Aluminum Alloy+Ceramics