What is Stick Filament - How do you use it?

[corim123]

Is there a way I can get this in 1.75mm?

Or, alternatively, is there a way I can use 3mm filament with a 1.75mm extruder?

No. I mean maybe you could get it to fit depending on your exact extruder but you will have to modify all your settings and for the most part you need to change out some hardware.