I needed a way to transfer solder flux between syringes.
Using PLA+, printed at .1mm layer height, .4mm nozzle, and 80% infill. Printed on Snapmaker A350 and Dremel 3D45, both provided a tight fit, thanks to wavexx' design.
The author remixed this model.
I mirrored the male half of the luer lock cap published by wavexx.