Abstract: Cylindrical body the outer periphery of which is provided with means to counteract vibrations occurring in that body as a result from transverse flow against it, these means comprising a number of small planes mounted according to a certain pattern and placed substantially perpendicular to the outer periphery of the body, which planes form an angle of from 5.degree. to 25.degree. with the cross-section of this cylindrical body; the surfaces of these planes at the most amounting to 2.5% of the surface of the cross-section of the cylindrical body and their lengths at most to 20% of the diameter of this body.