Campagnolo Centaur 11 speed cassette.
This differs from other cassettes in the campagnolo range. It is a cheaper for one and is interchangeable with other Campagnolo cassettes. You can use it with your super record group if you like.
The cassette is made of seperate steel sprockets untill the last three cogs. The lock ring is deeper than other Campagnolo lockrings and must be done up to 50Nm. Failure to do this may result in shifting issues and notching. If in doubt get a shop to fit it or buy a torque wrench.
The cassette shifts like others in the range, perfectly.