FS - Free of charge Spring series provide vibration isolation for base mounted that installed on ground or base. These open spring isolators compress on neoprene cups and take in minimal and high frequency vibrations. RND rails are utilized to increase equipment bases, eliminating more than-hand and increasing pounds distribution https://sergiohcvoi.tinyblogging.com/helping-the-others-realize-the-advantages-of-structural-steel-inertia-base-for-heavy-duty-chillers-83519507