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This is a trumpet mouthpiece designed to be 3D printed in strong plastic.
The cup and bore size are comparable to a standard Bach 5c to Bach 3c mouthpiece.
I've personally printed this model on my own printer (Mendel Max 2) with success. I don't know what kind of printers Shapeways uses but it should work fine. From the prints I've done I would say the sound quality is not distinguishable from a regular Bach mouthpiece and it's even more comfortable to play!