Vibration damper of the series GBL, consisting of two damping cushions, one sleeve and two cushion seats, are the most flexible coherent mounting elements. Due to the sleeve the elements can be pre-pressed individually. Because of this, the movement of the whole system can be defined easily. Vibration dampers of the series GBL are often used in rail vehicles to mount complete tank systems or generator sets. A mounting under the roof with this elements e.g. for cooling units can be realized as well.