Shimano 11T Bike Pulley set Rear Derailleur Guide Roller RD 5700/T6000/6800/6870/7900/R9000/R9070/R9100/M8000/M663//M9000/M9050|Bicycle Derailleur| - AliExpress
Tension and Guide Pulley Set for Rear Derailleur Shimano RD-R8000 4524667762768 | eBay
Shimano Y5XF98130 RD-M773 Guide & Tension Pulley Set :: £13.80 :: Components. :: Gears Rear - Spare Jockey Wheels 9/10/11 Speed :: For Hand built bike wheels & all your cycling needs!
Shimano Pulley Set RD-6700 - Jockey Wheels - Ceramic for Ultegra, XT, Saint 11T 4524667360773 | eBay