It's a low profile cable hider with a smooth upper surface to allow for rolling things to relatively easily pass over it. It is sized for two Amazon basics 1.3mm^2 / 16Gauge speaker cables side by side.

It is having two 5mm wide and 2mm deep slits so it can be glued to the ground with double sided tape while still sitting flush with the ground.

Printed in PLA it is strong enough to survive any normal load that might occur in a household.

When I have time, I will add versions to run along walls and around corners.

To get a truly smooth upper surface, print with it standing up. Add a brim as needed to keep it from falling over.