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Preform Lock (PETling-Verschluss) — image 1
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Preform Lock (PETling-Verschluss)

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This is a lock mechanism for preform tubes (PETlinge) that can be used to secure a logbook inside a preform tube.

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This is a lock mechanism for preform tubes (PETling) to secure a logbook inside a preform tube. It can be used for field puzzles, where the geocacher has to figure out a code before logging the cache. Of course, one can also use it for other puzzles, e.g., in an escape room context.  

The smaller model can be used when there is no lid in use. If you want to have the preform tube waterproof, you need to screw a lid on top of it, and then you have to use the larger model.

Printing should be done with 25% infill, and you need support for the overhangs. 

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