The 3-way RCA leads used to connect composite video/audio are interchangeable with Component video which means instead of red, green and blue you can substitute the usual yellow (video), white and red (audio) to make the connections. They're also usable for audio only too, if you just ignore the video connector. So if you had three-jack Component video and two-jack L/R audio to extend, two of these might do as substitutes when joined with two Triple 3 RCA Phono to RCA Phono Female Connector/Coupler [Electronics
These cables don't work well in that role, though. It was easy to spot how much noise they added when trying to connect YPbPr Component video. The previous cables, also yellow/red/white composite types although much shorter, demonstrated very extra little noise that wasn't already present on the source (1080i from Xbox 1). Yet by connecting only the Y (green) channel to each of the jacks in turn on these 5m ones (I bought 4, they're all the same), I was able to identify lots of visible artifacts in the form of speckled dots, ghosting and pulsing parabolic lines on the monochrome picture most of which were still visible when the other two jacks were connected for full colour. The fact that the yellow video jack is thicker makes absolutely no difference to image quality, either.
These types of connection are unbalanced, which means the longer the cables are the more subject they are to interference. This is why it can be worth spending money on well-shielded versions especially in cases where the signal is analogue, which after trying these I would recommend. They're not terrible, but for not much extra there are better cables out there.