Disclaimer: I've not yet tried printing this (or any other thing, for that matter) since my printer has just recently shipped, so if you try and print this thing, please leave some feedback as to how it went; I'm dying to find out!
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This is a Tuba mouthpiece designed by yours truly. I can't say I like plastic mouthpieces, but I think it would be handy to have one for the late marching season when it starts getting cold outside. I'm obviously no professional, so I can't say the piece will sound very good, but it's not intended for orchestral use, so I'm not too concerned about it. Let me know if you have any issues using it, and I might be able to help if you specify the brand and key and such of your instrument.