Bottom support piece for accordion.

thingiverse

The accordion support often breaks after several years, especially on larger instruments used in conservatories. Be cautious of the off-centered screw hole; two mirror-image pieces are available to fit accordingly. Accordion parts stores rarely stock these pieces, so consider creating your own if you live near Castelfidardo, Italy where these shops are scarce. The design was created using Google Sketchup and requires minimal adjustments for a perfect fit.