Compatible Models:

Tuba:
YBB-201
YBB-201(2)
YBB-201M
YBB-201MS
YBB-201S
YBB-201S(2)
YBB-202M
YBB-202MS
YBB-321
YBB-321(2)
YBB-321S
YBB-321S(2)
YBB-621
YBB-621S
YBB-631
YBB-631S
YCB-621
YCB-621S
YCB-822
YCB-822S
YEB-201
YEB-201M
YEB-201MS
YEB-201S
YEB-321
YEB-321S
YEB-381
YEB-381S
YEB-631S
YEB-632
YEB-632S
YFB-621
YFB-621S
YFB-822
YFB-822S

Sousaphone:
YSH-301
YSH-301(2)
YSH-301(3)
YSH-301S(2)
YSH-411
YSH-411S