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Any one know the bore size of the Neo 632 BBb tuba?, can't seem to find it anywhere, does'nt seem to appear on avertiser's spec list's
or is it a secret lol Happy new year to all

i have one of these, great tuba. the bore size is 18.5-20.0mm[0.728"-0.787"].found this in yamaha's latest wind instrument catalogue. hope this helps.