Shimano 9 speed cassettes require two types of sprockets

- 1 Start sprocket PS1-S
- 8 Sprockets PSL-S10 for position 2 - 9

Spacers:

- 7 DS2.9

Antiflex:

- one FL9 for each Aviotek sprocket larger than 21 T

To run a Campagnolo 9 speed cassette on a Shimano hub simly replace the sprockets by PS1-C and PSL-C. Campagnolo tolerates the small difference in spacing if you adjust the RD exactly to the fifth sprocket.