This magnetic bead sorter could be place onto some rotating device. Remember that you would like to see the magnetic beads, so colour should probably not be a dark one (black has been a very bad idea). The holes are adapted for 1.5 ml Eppis.
Should be printed in two Parts. Used round magnets from Magnet Expert, 10mm (outer diameter) x 3.2 mm (inner diameter), 5 mm heights neodymium. To be glued to the holes in the lower part.
The upper pins for fixing the cover should probably printed in a lower speed.
Nothing to do. Should work fine.