Produced using special resistant elastomeric material, the X-Rings seals are a sort of evolution of the O-Rings. These seals have a particular form, realised with four symmetric edges which give them a better flexibility, in contrast with the O-Rings, which satisfy their sealing function in static application being squashed on the surfaces. The X-form allows also the creation of a lubricant liquid reserve between his edges, so friction has less consequences on the part and makes this element perfect for dynamic applications avoiding the stick-slip effect and waste of energy.