PCR tube holder
thingiverse
36 (4 x 9) hole PCR tube holder. Does your lab have a PCR tube holder? Is it a raised "ergonomic" PCR tube holder? If you answered no to any of these questions, then this is for you! Print upside down to save PLA, so no supports necessary. 15% infill is fine. Just don't bend or twist the rack for obvious reasons.
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