Widespread Uses: to deliver a concrete mass, for base-mounted centrifugal pumps, that stops differential motion involving driving and driven associates, connected by a flex travel; to reduce the substantial vibration amplitude (unbalanced forces) located in air compressors and vacuum pumps; to lower the middle of gravity of tall, slender units; https://edgarwqlew.ageeksblog.com/38058949/the-2-minute-rule-for-concrete-filled-inertia-base-for-vibration-isolation