Filament roller for RepBox with filament slide bars

Bought Prusa RepBox, it came with Filament slide bars. Did not like the friction. 

This roller is designed to be used with the bearings that came with Prusa MMU2S for the spools. No screws needed. 

Layer height: 0.2mm
After print is done, cut 1-2mm from the smallest bars. It will make the press-fit easier. See attached picture.