Having ordered a 'kit' of parts to do the PCV system on my V70 I've ended up with the hose in the title which isn't used on my car, unfortunately the delay between ordering, one of the parts coming from Sweden and me getting around to doing the job means I can't return it. From what I can workout it runs from the top of the PCV Oil trap up between the inlet manifold and over the engine presumably to a vent on the rocker cover. It's genuine Volvo, unused, only bought a couple of months ago and cost me £43
If someone on the forum wants it message me and we'll sort something out.