A simple Nozzle holder for v6 nozzles with a m6 thread. This nozzles are installed on a mk3/s/s+ for example. The holder fits 4 nozzles, the slots are described with 0.25, 0.4, 0.6, 0.8, to prevent chaos in your nozzles.

I added different tolerances because not all printers print with the same accuracy.