Item type: Bike Rear Derailleur Pulley
Material: aluminium alloy
Specification: applicable to 4/5/6MM shaft guide screw
Optional type: 14T 15T 16T
Package Contents: 1 pcs Bike Rear Derailleur Pulley
Color: As Picture
Size: 14T diameter is about 55mm, 15T diameter is about 57mm,16T diameter is about 63mm