Shimano Ultegra RD-R8000 Rear Derailleur 11 speed short cage.

Shimano Ultegra RD-R8000-GS Outer Plate & Plate Stopper Pin for Long Cage

Shimano Ultegra R8000 11-Speed Rear Derailleur - Black

Shimano Ultegra RD-R8000-SS R8050-SS Rear Derailleur Inner Plate for SS Type

Shimano Ultegra Rear Derailleur Cage Outer Plate Y3E998070 (RD-R8000-SS) NIB

Shimano Ultegra RD-R8000-SS 11 Speed Mechanical Rear Derailleur 8000

Shimano Ultegra RD-6700-A 10-Speed Outer Plate & Plate Stopper Pin - SS Type

Shimano Ultegra RD-6700-A 10-Speed Outer Plate & Plate Stopper Pin - GS Type