Printer: Wanhao Duplicator i3
Filament: Devil Design - PETG - Light Green (You can use whatever filament you want.)
Extruder temperature: 235 °C
Bed temperature: 70 °C
Infill: at least 30%.
Support: I think it's not necessary if you align the model vertically. I printed it with supports and with horizontal alignment, haven't tried to print it vertically.
Slicer that I used: Cura
The author hasn't provided the model origin yet.