This is an adjustable (using a knob) and low profile filament holder for the Original Prusa i3 MK2.
You can download STL files for all the pieces from this Thingiverse address:
http://www.thingiverse.com/thing:2122419
For more projects please visit my web site:
https://www.yo3ggx.ro
Free music from YouTube library:
Blue Skies - Silent Partner
Safety Net - Riot