Promisen 13T MTB Ceramic Bearing Jockey Wheel Pulley Road Bike Bicycle Rear Derailleur;

Setting for 4/5/6mm spindle shaft roller
Apply for most rear derailleur in the market, support 7/8/9/10 speed
Transmission for a bicycle,stainless steel bearing for ultra durability
5 colors for choose: Black, Silver, Blue, Red, Gold
Quantity: 1 Pc
Note:
1.Transition: 1cm=10mm=0.39inch
2.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
Package includes:1 x Bicycle pulley wheel (without retail package)