Geeetech

I have a question about how to configure the printer for a hole diameter nozzle:
[list=*]0,2mm
[*]0,3mm
[*]0,5mm
[*]0,8mm[/list]

Additional question, what is the maximum diameter of the nozzle gap for which the printer will work correctly with a 1.75 mm filament?

Hole diameter nozzle for M201:0.4mm (Default)
Not commend to use 0.2mm or 0.3mm (Easier to clogged on M201)
The maximum diameter of the nozzle gap depends on the stepper mm value and filament flow.