12T Bicycle Aluminum Rear Derailleur Pulley Ceramic Bearing Jockey Wheel for MTB Mountain Road Folding Bike
Features:
Suitable for 4/5/6mm shaft pulley screws;
Support most 7-11 speed rear derailleur;

Specifications:
Color: A(black)
Type: 12 teeth
Structure: ceramic bearing
Material: aluminum alloy
Diameter: about 50mm/1.97"
Thickness: 8mm/0.31"
Weight: 11.6g/pc

Package Content:
1 x Rear Derailleur Pulley