4x Shorter 5mm-Radius Test Tube Holder
thingiverse
Not an entirely original design here on Thingiverse. There's a lot of other great alternatives. Also kinda an old concept, there are a few things I'd change to 'overdo' it, but let's keep it simple shall we. [Deeper slot for the disc to keep it in place perhaps. Kinda overdid is with the fillets too, lol.] A family member requested this a while back for testing fish tank water. The height of the 5mm tubes (10mm diameter) they use are around 85mm tall. If you actually enjoy the design and would like more than four slots, leave a comment and I'll get to it ♥
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