Selling a used cassette, taken off an old racing bike. Condition see photo.

Manufacturer's description:
It is super light, extremely quiet, and undoubtedly an advantage for your performance. Nine sprockets are machined from a single piece of high-grade tool steel, which allows for increased cassette stiffness and reduced weight even below the level of a titanium cassette. Between each sprocket is a StealthRing™ elastomer, which reduces vibration and cassette noise. Cutouts on the largest sprocket further reduce the weight of the cassette and add to its stiffness. This cassette is the final p...