3 per pack,fits the following:

FH200 Bach  Flugelhorn
FH200S Bach  Flugelhorn
TR300H2 Bach  Bb Trumpet
Mercedes II Bach  Bb Trumpet
TR300H Bach  Bb Trumpet
LTR100 Liberty  Bb Trumpet
CR310 Bach  Cornet
1530 Bundy  Bb Trumpet
TR300HS Bach  Bb Trumpet
TR300HP Bach  Bb Trumpet
CR300HP Bach  Cornet
CR300H Bach  Cornet
CR310S Bach  Cornet
CR300HS Bach  Cornet
1531 Bundy  Cornet