Bicycle Bike Ceramic Bearing Jockey Pulley Wheel Set 18.9x6.8x9.5cm

OverviewThis carbon fiber bike rear derailleur will save your bike chain friction resistance.
Features:
Full carbon fiber frame.
7075 aluminum alloy guide wheel.
Ceramic bearings make it smooth.
Durable and super light (68g).
Suitable for Shimano 6800/6870/4600/9000/9070 Ultegra/DURA ACE.
Specifications:
Material: Carbon fiber & Aluminum alloy
Color: Black / Black & Red (optional)
Size: 16T+16T*79L
Applicable: For Shimano 6800/6870/4600/9000/9070 Ultegra/DURA ACE
Weight: Approx. 68g / 2.4oz
Package Size: 18.9 * 9.5 * 6.8cm / 7.4 * 3.7 * 2.7in
Package Weight: 126g / 4.4oz
Package List:
1 * Rear Derailleur Pulley