I feel like this is probably a really dumb question, but I just got a new gravel bar from Lexon. It came with a normal metal compression ring shaped like a C, this is what I'm familiar with from all previous work on my bikes. However, it also came with this weird looking thing that maybe is a different type of plastic compression ring? It's on the Aliexpress page as a "cable guide" but definitely does not fit anywhere but where the compression ring would go.
Am I crazy, does this serve some other purpose? If I'm right, which one would be better to use? I don't want to cut brake hoses to put the new top cap on yet, so I haven't been able to test on the bike, but the metal one sits a little bit deeper if I put it on top of a bearing.
(Also, I really don't understand the point of breakaway spacers that don't open at the cable/hose section and only open at the fork part, but that's a whole other thing.)