Pasuunan suukappaleen Sankki-osa Large F-Cup

Small shanks: (for small tenors, altos, and small shank euphoniums)
alto S - backbore for most Eb alto trombones, slightly smaller taper than tenor to go in farther
alto - backbore for Eb alto trombones with normal tenor taper
2 - backbore for .485 to .500 bore trombones
3 - backbore for .508 to .510 bore trombones
4 - backbore for .525 bore small shank trombones, and euphonium
5 - very large small shank backbore, especially for .525/.547 dual bore trombones, and small shank euphoniums

Medium euphonium shanks: (for some Besson, Willson, and others)
6E - for all medium-shank euphoniums, E taper fits medium-shank Bessons and Willsons; others on request

Large shanks: (for .547 bore trombones and all large shank euphoniums)
8 - standard large shank backbore, best design for most trombones
9 - larger backbore, especially for dual-bore large shank trombones, and euphoniums