1 foot of Holton, french horn & trombone rubber bumper stock. Cut your own. Flat sided neoprene with 3.3mm round diameter.See my Item ID: 274248755270 for a Holton Collegiate G-Trigger Trombone TR-650 (has a larger 3.9 diameter).
Fits:
77
77N
H105
H175
H176
H177
H178
H179
H180
H181
H188
H189
H192
H200
H275
H276
H277
H278
H279
H280-H280ERA
H281
H288
H289
H292
H378
H379
H602
H650
H651M
H652M
LB77
TR150
TR158
TR160
TR181
TR680