How to find the most suitable spray nozzles for my guns

Different powder coating guns match different spray nozzles. And the nozzles split size is also different if you paint the different shpe metal object.

1.  Flat jet nozzle type NF20 is used on manual powder guns, for flat object.

2.  Flat jet nozzle type NF21 is used on manual and automatic powder guns for complex parts(deep recess)

3. Flat ject nozzle type NF22 is used on anual and automatic powder guns for complec parts(deep recess),targe spraying,robot applications.

4. Flat jet nozzle type NF24 is used on manual and automatic powder guns for large object,flat parts,complex parts when nozzle close to the object.