To Vibro-SH.F combines the use of rubber and spring to better deal with both low and other acoustic frequencies that can be transmitted through the metal spring. It consists of a metal casing made of steel plate, compression spring according to DIN specifications, and Regufoam type anti-vibration rubber. At the end, a string can be placed on the upper part of this, screw or loop closed. It is possible to preload it by tightening the lower nut.