12-25t cassette 10 speed , CS-6600 lockring but I suspect the cassette may be Dura Ace due to the two distinct colours , it's in pretty decent condition and would be ideal for a retro build or lightweight TT rig
Shimano Ultegra Cs6600 10 Speed Cassette 14-25t
Shimano Ultegra Ultegra/XT RT-CL800 Ice Tech FREEZA Centre Lock Disc Brake Rotor
SHIMANO Ultegra RD-R8000 Ultegra 11-speed rear derailleur GS cage, Black, One Size, IRDR8000GS, Grey
Shimano Ultegra RD-R8000 Ultegra 11-Speed Rear Derailleur
Shimano Ultegra FC-6800 crank arm fixing bolt Hollowtech II Ultegra 105 Tiagra
Shimano Ultegra RD-6800 Ultegra Di2 RD-6870 Tension & Guide Pulley Set Y5YC98140
