This is a second iteration of https://www.prusaprinters.org/prints/43072-prusa-i3-metal-frame-filament-guide . The loops for the filament are larger and thinner. Depending on the feed angle of the filament, the first iteration was sometimes restricting the filament movement.
Furthermore, there are four files: two for a dual extruder and two for a single extruder printer. Each group has a 6.5 mm and a 7 mm grip width. Depending on the material, the 6.5 mm version is sometimes a bit too tight.
The author marked this model as their own original creation. Imported from Thingiverse.