Originally posted by davewerden
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Originally posted by DutchEupho
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"Normal" (Bass Trombone) = 12.5mm
Some other size (Yamaha?) = 12.65mm (+3mm)
Mirafone Large Shank? = 12.7mm (+4mm) <-- I think Euphoniums have been using this recently
Chinesium example I own = 12.75mm (+5mm)
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