Made this specifically to hide 5 wire LED cable that runs under kitchen cabinets. Would fit other wire as well, as long as the wire is not too thick - speaker wire and other low voltage wire are good candidates. Each piece is 180mm long, adjusting to your print bed can be done easily in most slicers. Used 3M strips to mount it to the wall.

Included the .obj and Fusion360 files along with .stl

Includes pieces to hide joins and change directions (horizontal and vertical "L Joins").

Only the Vertical L Join part requires support.