I bought these extensions to organize the cables of the fans and to hide them in the case. There's not much to say about them. 3 cables, each 30cm long, with plastic coating/protection on the outside. You can't tell that they are Noctua in terms of price/quality, but they seem to be of good quality without any issues. They were a good choice for the 6€ I paid, as individually they would have cost 9€.