Face Mask Holder keyring with stronger thread
Description
Credit to farmilo for the idea. This is a re-creation with slightly increase thickness to allow for a stronger thread. I found the thread on the original either didn't print correctly, or was only a single extrusion line thick and would break easily. I also added space for a o-ring to improve friction when shut and offer some waterproofing. I printed this in NinjaFlex Cheetah TPU with good results, however YMMV. If you wanted to try and buy a oring to match the dimensions you'll need are roughly ID: 22mm CS: 1.35mm I don't know if such a o-ring is readily available or if that will be a accurate fit
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