Through this vibration "damping" the vibrations of my washing machine has been significantly strengthened! In my view, a design flaw: the parts are in their opening for the washing machine feet naturally much larger to fit for all sorts of possible feet. If the washer is not free in the room, but in the base or in a corner, then you can not make sure that the damper exactly centrally located to walk to. What would be bad not continue when the damper from a solid piece would. But he is hollow and the bottom is in this cavity only a thin cross made of rubber. Are one or more feet now not centered on the damper, which can not be sure of the above reasons, unfortunately in my case (washing machine in the corner), we obtain on each foot a different attenuation, which is probably responsible for the increased vibration behavior.