Taiwan bicycle accessories mountain bike for cervelo road bike Rear Derailleurs Bicycle Pulley

1.Description: ultra light CNC 13T mountain bicycle/road bicycle ceramic bearing jockey wheel/guid wheel/rear derailleurs wheel 

2.Model No.: WS-D03A2
3.Teeth:11T/12T/13T/14T
4.Bearing option: steel or ceramic 
5.Weight: 7g(ceramic bearig)/9g(steel bearing)
6.Size: 5mm&6mm diameter 
7.Material: aluminum alloy AL6063+ceramic/steel
8.Color: anodized black/red/gold/blue/silver/green
9.Processing: CNC
10.Packing: Card with plastic
11.Compatibility: shimano&sram, 8/9/10/11 speed
12.Surface finish: Machined surface and sharp edges deburred
13.Standards: According to customer's drawing, sample and special request
14.Applications: Bicycle Industry