Can custom filament sizes be made?

Custom filament sizes can be achieved by installing a custom nozzle or drilling out a nozzle to the size that is needed. You should always use a slightly larger nozzle than the desired diameter as you will always be "pulling down" the diameter due to the nature of filament extrusion and the cooling process. We found that using nozzles in the 4mm-5mm range on the EX6 did not yield good results.