This is an authorized part for these Yamaha Clarinets.

For models:

ADCL-1
YCL-20
YCL-200AD
YCL-200AD(2)
YCL-200DR
YCL-200DT
YCL-250(#001001-)
YCL-250E
YCL-250SUK
YCL-255
YCL-255E
YCL-255S
YCL-26
YCL-26(2)
YCL-26(2)M
YCL-26(2)MSUK-T
YCL-34
YCL-34(2)
YCL-34(2)S
YCL-350DX
YCL-355
YCL-400AD
YCL-450(#101001-)
YCL-450(3)
YCL-450E
YCL-450E(3)
YCL-450M
YCL-450N(3)
YCL-450N/E
YCL-450NE(3)
YCL-450NM
YCL-52
YCL-550AL
YCL-C100
YCL-S1