Sram XX1/X01 Eagle Type 3 Cage Lock, Black | Bikeinn
SRAM Rear Derailleur Clutch Cage Lock w Spring 11.7518.045.000
SRAM XX1/X0/X9/X7 Type 2 Rear Derailleur Cage Lock with Spring | eBay
SRAM XX1 Eagle/X01 Eagle Type 3 Cage Lock with Spring, Gray | Worldwide Cyclery
SRAM Cage Lock- new bike with SRAM XO derailleur, muddy day so was washing things off and this little piece went flying. Discovered it's the cage lock, cool feature but it's ridiculously
Sram SpartPart XX1 X0 X9 Type2 Rear Derailleur Cage Lock With Spring | eBay