Bung (for swiss ball)
thingiverse
To replace my 75cm Swiss ball bung, I chose to print two copies of bung.stl. This ensures that any potential de-lamination doesn't leave me with a useless ball. Both printed bungs seem airtight and function well. However, bung.stl does not render properly on Thingiverse. For use, simply print, glue in place, smooth rough edges, and enjoy.
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