Derby 2001 hose length or length

Hello good morning.
Some of you colleagues, who know how much the vacuum hose is (they also say that it is called advance), there are those who comment that the original is green and leaves the computer or ECU and is connected to the motor admission multiple.
My car is a 2001 Volkswagen Derby, 1.8 liter Add engine, standard .
The one that has installed my car is black, I suppose that the previous owner changed it, but it is broken and I want to change it. I want to be sure of its length, since just like the one they changed, I imagined, I imagine that perhaps they did not measure it the same, and I do not want to trust me. I await your answer and help. Thank you.