https://www.tme.eu/cz/en/details/cf2021s/rj45-cables/logilin...It's actually pretty cool - it's very flexible and convenient.
It's difficult to solder and impossible to crimp though (so we use these factory-made), and I would not use PoE with it (the gauge - 32AWG - also means that it is really thin, and as it's steel, the resistance must be terrible. But for data, it works good.)