Nozzle Swaps

I havn't got my Cetus quite yet, but when I do, I want to experiment with nozzle sizes. What nozzle thread type/size do I need to use if I buy a nozzle? I'd really like to know so I can order some nozzles to come in when my Cetus does.

The Cetus uses a unique nozzle design.  You need to order nozzles from Cetus.