Hi, it seems that there is a karate tux but not Taekwon-do ITF tux. Simililar but not exactly the same. The black at the bottom of the shirt of the dobok and the shirt cross in the middle instead of the side. Also notice the tag on the left side of the chest.

Thank you again, much appreciated!! also if it's possible to have a wallpaper of that!

This is a black belt 1 to 3 dan

On this, in foreground all "normal" black belt dobok. On the background you can see a 4th dan or up dobok(left) and color dobok too(right). You can see different types of dobok.

the tag

Thank you again, much appreciated!! also if it's possible to have a wallpaper of that!