I was looking at a Geeetech 3D printer over at Banggood, and I see that when you order, you have several filament and nozzle options. I do not know enough about the differences to choose. The filaments are 1.75mm & 3mm, and the nozzles were 0.3mm, 0.4mm, & 0.35mm.
Over at Folgertech, the RepRap i3 & 2020 are 1.75mm filament, I didn't see anything on the nozzle size.
Can you guys educate me and make some recommendations?