These dampers comply fully with its purpose. At first they appear to be very hard so that one wonders whether the hard material fact may result in a vibration dampening. In operation, however, shows that this is, probably, works very well because of the additional weight machines. In our old building with wooden beams, the vibrations during the spin cycle in the whole house were felt, which is now almost completely eliminated. Also, the noise level has dropped considerably. The result has even exceeded my expectations considerably subjective.
The delivery was absolutely flawless, sooner than forecast.