This rack holder comes with a bottom and a top part that when screwed together securely can attach up to 12x 15 ml conical tubes to a rotator (laboratory rotation device). Using this model, the whole apparatus can be easily and quickly loaded. Please ensure that when handling the loaded tube holder, it does not come apart as tubes are only held in place when pressure is placed on the plates.
Recommended print settings: 0.2 mm layer height, 50% or more infill, 4 shells. Make sure to add sufficient infill as holder could get crushed when attaching. Printed very well on a Prusa i3 MK3. Material: PETG would probably be best (please consider shrinkage as tubes might not fit) but our model in PLA fits and works great.
If possible use PETG or ABS for printing.