Hide those nasty cable runs in this 2 piece cable run. No supports required, fits on most beds, adjustable in length (cut in PrusaSlicer) and usable with screws for a more permanent solution or removable Command strips for a rent-friendly solution. Inner size is about 20mm which is good for roughly 8 full thickness power cables or many more smaller cables. Throw it behind your desk, in the corners of your walls or along the edge of the floor and paint to match if you want a very subtle aesthetic. 0.3mm clearances for easy fit.
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