Filament Guide for use under spool holders on wall control pegboard
See also:
MMU2s Filament buffer pegboard hook
https://www.prusaprinters.org/prints/1628-prusa-mmu2s-filament-buffer-peg-hook
Multi-spool Holder for Wall Control Pegboard
https://www.prusaprinters.org/prints/1624-multi-spool-holder-for-wall-control-peg-board-and-
The author hasn't provided the model origin yet.