Function of the “telescopic element” is the last phase of sealing and fastening the wall to achieve the best possible soundproofing. Turning the handle will cause mechanism to push the aluminium profile all along the complete length of the element, which will adjust itself to the point of fastening. The pressure power of the aluminium profile is 2000 N/m. The final processing of the aluminium sealing telescopic profile surface is the same as the external surface of the movable wall.