GeoBin Composting System closure Key
thingiverse
The GeoBin Composting System (GobBin is a registered trademark of Reynolds Preston Products., Inc, used herein in an allowed non-commercial setting) comes with 5 closure keys. I found that 6 were really the minimum number, and more are better. This will allow you to print as many as you need. I recommend printing NOT with PLA, since that does not weather well in the sun. I used PETG.
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