The present invention relates to an electromagnetic shielding device including at least one hollow protective textile sleeve having a main rest diameter D1 and an interior volume configured to receive one or several elongated element(s), and at least one hollow connecting textile sleeve having a rest diameter D2, D2 greater than Dl. The protective textile sleeve includes a substantially annular front part having a front open end, the connecting textile sleeve includes a substantially annular rear part having a rear open end, and the shielding device includes a first electrically conductive securing area in which the rear part of the connecting sleeve and the front part of the protective sleeve are at least partly secured.
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