These very low frequency isolators (down to 3 Hz) can be used to mount machine rotating at speeds over 450 rpm, vibrators and impact machines, achieving an attenuation of about 95%.
They are all metal and can be used outdoors or in the harshest conditions.
As they do not creep, their life time may be the same as that of the machine they are used to mount.
A metal cushion inside each spring increases the damping factor and limits the amplification at the natural frequency.