Flexible Renault Twingo Query 1999

Hello friends I tell you: I have a 1999 Renault Twingo and when I take it to the mechanic I indicated that it does not have flexible that they welded the tube only and that is why the car vibrates.
I want to buy a flexible to add that missing part but by searching I appear 3 diameters

which is the diameter indicated for my car?
Thank you very much for your answer

Hello, according to the model and the displacement, the tube diameter should not be greater than 1 1/2 "(an inch and a half)