This is 16mm wide trunking encased in a 33mm x 16mm strip of softwood, that inside I've routed out a slot.
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(given up on photobucket)
Primarily it's done here for mechanical protection as next to it is stored our Henry vacuum cleaner, and as vacuum cleaners go he is a bit boisterous when being returned to his staircase cupboard home.
However, if I were running cables across or down a wall, I think it looks a lot nicer than just the naked trucking, and the wood can be painted or stained as a feature. In fact a line of them centrally below a wall mounted TV wouldn't look too bad either, with the advantage that cables can easily be removed and replaced when needed.
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