Anti Vibration Spring Isolators with Side Restraint Used for Low Frequency Vibration Isolation Our R&D team has successfully completed the design, testing and manufacturing of a whole new series of Seismic Restrained Spring Mounts for Vibration Isolators called Vibro-MSR (Limited). The new product in the spring mounts category offers a load range that starts from low weights (50 kp) and can reach up to 750 kp per mounting point, completing the range of anti-vibration products for restrained mounts.