The file 'Trombone, Euphonium Piece 3D Printer Model' is (stl) file type, size is 975.4KB.
I printed this(http://www.thingiverse.com/thing:114129) for highschool junior, for buzzing practice.
They tell me that edge is right angle so hard to use.
Based on http://www.thingiverse.com/thing:114129
