Eazao Zero can use 0.6mm nozzle, you can see here: Nozzles
The smallest nozzle diameter that Eazao Zero can use depends on the particle size of the material. The finer the material, the smaller the nozzle diameter that Eazao Zero can use, which has nothing to do with the 3D printer.
If the particle size of the material is too large, the nozzle with too small diameter is prone to nozzle clogging. In addition, when the material is at the nanometer level, the material may undergo nano-aggregation, and it is easy to block the nozzle. In short, there is no restriction on the minimum diameter of the Eazao Zero nozzle, provided that you need to prepare a material with a sufficiently small particle size yourself.
The Eazao Zero extruder adopts standard luer fittings, which can be compatible with various types of nozzles. You can install nozzles of various diameters that you purchase yourself.
The standard Luer adapter at the nozzle of Eazao Zero: Noozle adapter
Eazao Zero can provide nozzle sets, Pink: 0.6 mm, Grey: 1.2 mm, Green: 1.6 mm, Blue: 2.2 mm: Nozzles