FS - Free Spring sequence offer vibration isolation for base mounted that put in on flooring or base. These open spring isolators compress on neoprene cups and take in reduced and large frequency vibrations. Problem: Horizontal and vertical seismic forces are used at the center of gravity from the device. https://steel-inertia-base68024.dbblog.net/12650916/industrial-inertia-base-can-be-fun-for-anyone