Thingiverse
I designed this to use in an rpg to keep track of my ammo. Figured somebody might find it useful.This was designed to hold 30mm diameter coins, American quarters are a bit smaller than that, so you should scale it down to 80% size if you want to hold quarters in it.
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This model is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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Check the license (see original page) on the original Thingiverse page. Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer.