Medical device, in particular for mixing medical fluid, respectively there is different elasticity made of the material including two tubular bodies (1,2) open end (7,11) to link together. The end (2) of second main body (11) is axially inserted into through the first bulk end of interior friction (7) and closed (1) then via radial projection (15), by the wall end (7) being plastically deformed the first main body (1) and engage against the second main body (2) of end (11).
